1012013321021 has 2 divisors, whose sum is σ = 1012013321022. Its totient is φ = 1012013321020.

The previous prime is 1012013321017. The next prime is 1012013321063. The reversal of 1012013321021 is 1201233102101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 763998364900 + 248014956121 = 874070^2 + 498011^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012013321021 - 2² = 1012013321017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012013321821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506006660510 + 506006660511.

It is an arithmetic number, because the mean of its divisors is an integer number (506006660511).

Almost surely, 2^{1012013321021} is an apocalyptic number.

It is an amenable number.

1012013321021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012013321021 is an equidigital number, since it uses as much as digits as its factorization.

1012013321021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1012013321021 its reverse (1201233102101), we get a palindrome (2213246423122).

The spelling of 1012013321021 in words is "one trillion, twelve billion, thirteen million, three hundred twenty-one thousand, twenty-one".