211220022210 has 16 divisors (see below), whose sum is σ = 506928053376. Its totient is φ = 56325339248.

The previous prime is 211220022203. The next prime is 211220022227. The reversal of 211220022210 is 12220022112.

It is a super-2 number, since 2×211220022210² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 211220022210.

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, 3520333674 + ... + 3520333733.

It is an arithmetic number, because the mean of its divisors is an integer number (31683003336).

Almost surely, 2^211220022210 is an apocalyptic number.

211220022210 is an abundant number, since it is smaller than the sum of its proper divisors (295708031166).

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

211220022210 is a wasteful number, since it uses less digits than its factorization.

211220022210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7040667417.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 211220022210 its reverse (12220022112), we get a palindrome (223440044322).

The spelling of 211220022210 in words is "two hundred eleven billion, two hundred twenty million, twenty-two thousand, two hundred ten".