213111220212 has 48 divisors (see below), whose sum is σ = 602738808000. Its totient is φ = 64579157280.

The previous prime is 213111220187. The next prime is 213111220249. The reversal of 213111220212 is 212022111312.

213111220212 is a `hidden beast` number, since 21 + 311 + 122 + 0 + 212 = 666.

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 15 ways as a sum of consecutive naturals, for example, 89692087 + ... + 89694462.

It is an arithmetic number, because the mean of its divisors is an integer number (12557058500).

Almost surely, 2^213111220212 is an apocalyptic number.

213111220212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

213111220212 is an abundant number, since it is smaller than the sum of its proper divisors (389627587788).

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

213111220212 is a wasteful number, since it uses less digits than its factorization.

213111220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179386573 (or 179386565 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 213111220212 its reverse (212022111312), we get a palindrome (425133331524).

The spelling of 213111220212 in words is "two hundred thirteen billion, one hundred eleven million, two hundred twenty thousand, two hundred twelve".