21100321122 has 32 divisors (see below), whose sum is σ = 42910113984. Its totient is φ = 6915585600.

The previous prime is 21100321087. The next prime is 21100321127. The reversal of 21100321122 is 22112300112.

It is not an unprimeable number, because it can be changed into a prime (21100321127) 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, 168972 + ... + 265992.

It is an arithmetic number, because the mean of its divisors is an integer number (1340941062).

Almost surely, 2^21100321122 is an apocalyptic number.

21100321122 is an abundant number, since it is smaller than the sum of its proper divisors (21809792862).

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

21100321122 is a wasteful number, since it uses less digits than its factorization.

21100321122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97634.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21100321122 its reverse (22112300112), we get a palindrome (43212621234).

The spelling of 21100321122 in words is "twenty-one billion, one hundred million, three hundred twenty-one thousand, one hundred twenty-two".