21311021321202 has 32 divisors (see below), whose sum is σ = 42696020810304. Its totient is φ = 7091347968000.

The previous prime is 21311021321171. The next prime is 21311021321207. The reversal of 21311021321202 is 20212312011312.

It is not an unprimeable number, because it can be changed into a prime (21311021321207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21581577 + ... + 22547427.

It is an arithmetic number, because the mean of its divisors is an integer number (1334250650322).

Almost surely, 2^{21311021321202} is an apocalyptic number.

21311021321202 is an abundant number, since it is smaller than the sum of its proper divisors (21384999489102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21311021321202 is a wasteful number, since it uses less digits than its factorization.

21311021321202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972234.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21311021321202 its reverse (20212312011312), we get a palindrome (41523333332514).

The spelling of 21311021321202 in words is "twenty-one trillion, three hundred eleven billion, twenty-one million, three hundred twenty-one thousand, two hundred two".