1002021021121 has 8 divisors (see below), whose sum is σ = 1007744034024. Its totient is φ = 996300063360.

The previous prime is 1002021021031. The next prime is 1002021021149. The reversal of 1002021021121 is 1211201202001.

1002021021121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 33890969025 + 968130052096 = 184095^2 + 983936^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1002021021121 - 2¹³ = 1002021012929 is a prime.

It is a super-2 number, since 2×1002021021121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002021021161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469491 + ... + 1491463.

It is an arithmetic number, because the mean of its divisors is an integer number (125968004253).

Almost surely, 2^{1002021021121} is an apocalyptic number.

It is an amenable number.

1002021021121 is a deficient number, since it is larger than the sum of its proper divisors (5723012903).

1002021021121 is a wasteful number, since it uses less digits than its factorization.

1002021021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027571.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1002021021121 its reverse (1211201202001), we get a palindrome (2213222223122).

The spelling of 1002021021121 in words is "one trillion, two billion, twenty-one million, twenty-one thousand, one hundred twenty-one".