1012202313021 has 12 divisors (see below), whose sum is σ = 1462433668540. Its totient is φ = 674633698560.

The previous prime is 1012202312977. The next prime is 1012202313043. The reversal of 1012202313021 is 1203132022101.

1012202313021 is a `hidden beast` number, since 10 + 122 + 0 + 231 + 302 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40028004900 + 972174308121 = 200070^2 + 985989^2 .

It is not a de Polignac number, because 1012202313021 - 2¹⁹ = 1012201788733 is a prime.

It is a super-2 number, since 2×1012202313021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012202312985 and 1012202313003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012202313071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13948756 + ... + 14021133.

Almost surely, 2^{1012202313021} is an apocalyptic number.

It is an amenable number.

1012202313021 is a deficient number, since it is larger than the sum of its proper divisors (450231355519).

1012202313021 is a wasteful number, since it uses less digits than its factorization.

1012202313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27973916 (or 27973913 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1012202313021 its reverse (1203132022101), we get a palindrome (2215334335122).

The spelling of 1012202313021 in words is "one trillion, twelve billion, two hundred two million, three hundred thirteen thousand, twenty-one".