211122112220 has 24 divisors (see below), whose sum is σ = 443366457408. Its totient is φ = 84446936000.

The previous prime is 211122112199. The next prime is 211122112247. The reversal of 211122112220 is 22211221112.

It is a congruent number.

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, 1083245 + ... + 1263195.

It is an arithmetic number, because the mean of its divisors is an integer number (18473602392).

Almost surely, 2^211122112220 is an apocalyptic number.

211122112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211122112220 is an abundant number, since it is smaller than the sum of its proper divisors (232244345188).

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

211122112220 is a wasteful number, since it uses less digits than its factorization.

211122112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238621 (or 238619 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211122112220 its reverse (22211221112), we get a palindrome (233333333332).

The spelling of 211122112220 in words is "two hundred eleven billion, one hundred twenty-two million, one hundred twelve thousand, two hundred twenty".