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2002221001021 = 3895147097689
BaseRepresentation
bin11101001000101101101…
…010111110100100111101
321002102002020001101121011
4131020231222332210331
5230301022034013041
64131450240435221
7264440621462503
oct35105552764475
97072066041534
102002221001021
1170215661481a
12284063918b11
13116a68739967
146cc9d836673
1537137e96e81
hex1d22dabe93d

2002221001021 has 4 divisors (see below), whose sum is σ = 2007368099100. Its totient is φ = 1997073902944.

The previous prime is 2002221001013. The next prime is 2002221001063. The reversal of 2002221001021 is 1201001222002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1234387660900 + 767833340121 = 1111030^2 + 876261^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002221001021 - 23 = 2002221001013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002221000992 and 2002221001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002221001421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2573548456 + ... + 2573549233.

It is an arithmetic number, because the mean of its divisors is an integer number (501842024775).

Almost surely, 22002221001021 is an apocalyptic number.

It is an amenable number.

2002221001021 is a deficient number, since it is larger than the sum of its proper divisors (5147098079).

2002221001021 is an equidigital number, since it uses as much as digits as its factorization.

2002221001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5147098078.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2002221001021 its reverse (1201001222002), we get a palindrome (3203222223023).

The spelling of 2002221001021 in words is "two trillion, two billion, two hundred twenty-one million, one thousand, twenty-one".

Divisors: 1 389 5147097689 2002221001021