21100002221210 has 64 divisors (see below), whose sum is σ = 42928109239680. Its totient is φ = 7396629300480.

The previous prime is 21100002221201. The next prime is 21100002221257. The reversal of 21100002221210 is 1212220000112.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3092237 + ... + 7194576.

It is an arithmetic number, because the mean of its divisors is an integer number (670751706870).

Almost surely, 2^{21100002221210} is an apocalyptic number.

21100002221210 is an abundant number, since it is smaller than the sum of its proper divisors (21828107018470).

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

21100002221210 is a wasteful number, since it uses less digits than its factorization.

21100002221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10287503.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21100002221210 its reverse (1212220000112), we get a palindrome (22312222221322).

The spelling of 21100002221210 in words is "twenty-one trillion, one hundred billion, two million, two hundred twenty-one thousand, two hundred ten".