21013231202002 has 16 divisors (see below), whose sum is σ = 33949042144920. Its totient is φ = 9697102474752.

The previous prime is 21013231201973. The next prime is 21013231202003. The reversal of 21013231202002 is 20020213231012.

It can be written as a sum of positive squares in 4 ways, for example, as 8337431026521 + 12675800175481 = 2887461^2 + 3560309^2 .

It is not an unprimeable number, because it can be changed into a prime (21013231202003) 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, 54467677 + ... + 54852112.

Almost surely, 2^{21013231202002} is an apocalyptic number.

21013231202002 is a deficient number, since it is larger than the sum of its proper divisors (12935810942918).

21013231202002 is a wasteful number, since it uses less digits than its factorization.

21013231202002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109327197.

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

Adding to 21013231202002 its reverse (20020213231012), we get a palindrome (41033444433014).

The spelling of 21013231202002 in words is "twenty-one trillion, thirteen billion, two hundred thirty-one million, two hundred two thousand, two".