21102211210 has 16 divisors (see below), whose sum is σ = 37985767776. Its totient is φ = 8440487248.

The previous prime is 21102211187. The next prime is 21102211213. The reversal of 21102211210 is 1211220112.

It is not an unprimeable number, because it can be changed into a prime (21102211213) 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, 273777 + ... + 342283.

It is an arithmetic number, because the mean of its divisors is an integer number (2374110486).

Almost surely, 2^21102211210 is an apocalyptic number.

21102211210 is a deficient number, since it is larger than the sum of its proper divisors (16883556566).

21102211210 is a wasteful number, since it uses less digits than its factorization.

21102211210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99317.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21102211210 its reverse (1211220112), we get a palindrome (22313431322).

The spelling of 21102211210 in words is "twenty-one billion, one hundred two million, two hundred eleven thousand, two hundred ten".