211220101222110 has 64 divisors (see below), whose sum is σ = 563949838209600. Its totient is φ = 56255736830976.

The previous prime is 211220101222043. The next prime is 211220101222253. The reversal of 211220101222110 is 11222101022112.

211220101222110 is a `hidden beast` number, since 2 + 11 + 220 + 101 + 222 + 110 = 666.

It is a super-2 number, since 2×211220101222110² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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, 483277659 + ... + 483714518.

It is an arithmetic number, because the mean of its divisors is an integer number (8811716222025).

Almost surely, 2^{211220101222110} is an apocalyptic number.

211220101222110 is an abundant number, since it is smaller than the sum of its proper divisors (352729736987490).

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

211220101222110 is a wasteful number, since it uses less digits than its factorization.

211220101222110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966993002 (or 966992996 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211220101222110 its reverse (11222101022112), we get a palindrome (222442202244222).

The spelling of 211220101222110 in words is "two hundred eleven trillion, two hundred twenty billion, one hundred one million, two hundred twenty-two thousand, one hundred ten".