1013020002221 has 4 divisors (see below), whose sum is σ = 1013040299292. Its totient is φ = 1012999705152.

The previous prime is 1013020002217. The next prime is 1013020002227. The reversal of 1013020002221 is 1222000203101.

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 276795940996 + 736224061225 = 526114^2 + 858035^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013020002221 - 2² = 1013020002217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1013020002196 and 1013020002205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013020002227) 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, 10073486 + ... + 10173551.

It is an arithmetic number, because the mean of its divisors is an integer number (253260074823).

Almost surely, 2^{1013020002221} is an apocalyptic number.

It is an amenable number.

1013020002221 is a deficient number, since it is larger than the sum of its proper divisors (20297071).

1013020002221 is an equidigital number, since it uses as much as digits as its factorization.

1013020002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20297070.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 1013020002221 its reverse (1222000203101), we get a palindrome (2235020205322).

The spelling of 1013020002221 in words is "one trillion, thirteen billion, twenty million, two thousand, two hundred twenty-one".