21211210012210 has 16 divisors (see below), whose sum is σ = 39840185762496. Its totient is φ = 8115593395888.

The previous prime is 21211210012207. The next prime is 21211210012247. The reversal of 21211210012210 is 1221001211212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46111325884 + ... + 46111326343.

It is an arithmetic number, because the mean of its divisors is an integer number (2490011610156).

Almost surely, 2^{21211210012210} is an apocalyptic number.

21211210012210 is a deficient number, since it is larger than the sum of its proper divisors (18628975750286).

21211210012210 is a wasteful number, since it uses less digits than its factorization.

21211210012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92222652257.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21211210012210 its reverse (1221001211212), we get a palindrome (22432211223422).

The spelling of 21211210012210 in words is "twenty-one trillion, two hundred eleven billion, two hundred ten million, twelve thousand, two hundred ten".