21021232321002 has 32 divisors (see below), whose sum is σ = 45142530401664. Its totient is φ = 6502010547200.

The previous prime is 21021232320971. The next prime is 21021232321009. The reversal of 21021232321002 is 20012323212012.

It is a self number, because there is not a number n which added to its sum of digits gives 21021232321002.

It is not an unprimeable number, because it can be changed into a prime (21021232321009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1451334399 + ... + 1451348882.

It is an arithmetic number, because the mean of its divisors is an integer number (1410704075052).

Almost surely, 2^{21021232321002} is an apocalyptic number.

21021232321002 is an abundant number, since it is smaller than the sum of its proper divisors (24121298080662).

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

21021232321002 is a wasteful number, since it uses less digits than its factorization.

21021232321002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2902683374.

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

Adding to 21021232321002 its reverse (20012323212012), we get a palindrome (41033555533014).

The spelling of 21021232321002 in words is "twenty-one trillion, twenty-one billion, two hundred thirty-two million, three hundred twenty-one thousand, two".