13021123402 has 16 divisors (see below), whose sum is σ = 22342832640. Its totient is φ = 5575254768.

The previous prime is 13021123397. The next prime is 13021123417. The reversal of 13021123402 is 20432112031.

It is a happy number.

It is a super-2 number, since 2×13021123402² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13021123402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420058 + ... + 449989.

It is an arithmetic number, because the mean of its divisors is an integer number (1396427040).

Almost surely, 2^13021123402 is an apocalyptic number.

13021123402 is a deficient number, since it is larger than the sum of its proper divisors (9321709238).

13021123402 is a wasteful number, since it uses less digits than its factorization.

13021123402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871125.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 13021123402 its reverse (20432112031), we get a palindrome (33453235433).

The spelling of 13021123402 in words is "thirteen billion, twenty-one million, one hundred twenty-three thousand, four hundred two".