21211102111210 has 32 divisors (see below), whose sum is σ = 41793044694912. Its totient is φ = 7686803359680.

The previous prime is 21211102111151. The next prime is 21211102111217. The reversal of 21211102111210 is 1211120111212.

It is not an unprimeable number, because it can be changed into a prime (21211102111217) 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, 329026134 + ... + 329090593.

It is an arithmetic number, because the mean of its divisors is an integer number (1306032646716).

Almost surely, 2^{21211102111210} is an apocalyptic number.

21211102111210 is a deficient number, since it is larger than the sum of its proper divisors (20581942583702).

21211102111210 is a wasteful number, since it uses less digits than its factorization.

21211102111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658117038.

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

Adding to 21211102111210 its reverse (1211120111212), we get a palindrome (22422222222422).

It can be divided in two parts, 21211102 and 111210, that added together give a palindrome (21322312).

The spelling of 21211102111210 in words is "twenty-one trillion, two hundred eleven billion, one hundred two million, one hundred eleven thousand, two hundred ten".