21321222210210 has 32 divisors (see below), whose sum is σ = 55107158944320. Its totient is φ = 5248300851648.

The previous prime is 21321222210193. The next prime is 21321222210221. The reversal of 21321222210210 is 1201222212312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27334899880 + ... + 27334900659.

It is an arithmetic number, because the mean of its divisors is an integer number (1722098717010).

Almost surely, 2^{21321222210210} is an apocalyptic number.

21321222210210 is an abundant number, since it is smaller than the sum of its proper divisors (33785936734110).

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

21321222210210 is a wasteful number, since it uses less digits than its factorization.

21321222210210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54669800562.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21321222210210 its reverse (1201222212312), we get a palindrome (22522444422522).

The spelling of 21321222210210 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred twenty-two million, two hundred ten thousand, two hundred ten".