21201322132002 has 16 divisors (see below), whose sum is σ = 42712152617952. Its totient is φ = 7015522651680.

The previous prime is 21201322131971. The next prime is 21201322132007. The reversal of 21201322132002 is 20023122310212.

It is a self number, because there is not a number n which added to its sum of digits gives 21201322132002.

It is not an unprimeable number, because it can be changed into a prime (21201322132007) 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, 12896180524 + ... + 12896182167.

It is an arithmetic number, because the mean of its divisors is an integer number (2669509538622).

Almost surely, 2^{21201322132002} is an apocalyptic number.

21201322132002 is an abundant number, since it is smaller than the sum of its proper divisors (21510830485950).

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

21201322132002 is a wasteful number, since it uses less digits than its factorization.

21201322132002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25792362833.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21201322132002 its reverse (20023122310212), we get a palindrome (41224444442214).

The spelling of 21201322132002 in words is "twenty-one trillion, two hundred one billion, three hundred twenty-two million, one hundred thirty-two thousand, two".