212013231228 has 72 divisors (see below), whose sum is σ = 539173514880. Its totient is φ = 70243524000.

The previous prime is 212013231187. The next prime is 212013231229. The reversal of 212013231228 is 822132310212.

212013231228 is a `hidden beast` number, since 2 + 1 + 201 + 3 + 231 + 228 = 666.

It is a super-2 number, since 2×212013231228² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212013231229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4376443 + ... + 4424621.

It is an arithmetic number, because the mean of its divisors is an integer number (7488521040).

Almost surely, 2^212013231228 is an apocalyptic number.

It is an amenable number.

212013231228 is an abundant number, since it is smaller than the sum of its proper divisors (327160283652).

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

212013231228 is a wasteful number, since it uses less digits than its factorization.

212013231228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48927 (or 48922 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The spelling of 212013231228 in words is "two hundred twelve billion, thirteen million, two hundred thirty-one thousand, two hundred twenty-eight".