212123012130 has 24 divisors (see below), whose sum is σ = 551519831772. Its totient is φ = 56566136544.

The previous prime is 212123012117. The next prime is 212123012147. The reversal of 212123012130 is 31210321212.

212123012130 is a `hidden beast` number, since 21 + 212 + 301 + 2 + 130 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 202308345369 + 9814666761 = 449787^2 + 99069^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1178461089 + ... + 1178461268.

Almost surely, 2^212123012130 is an apocalyptic number.

212123012130 is an abundant number, since it is smaller than the sum of its proper divisors (339396819642).

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

212123012130 is a wasteful number, since it uses less digits than its factorization.

212123012130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2356922370 (or 2356922367 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 212123012130 its reverse (31210321212), we get a palindrome (243333333342).

The spelling of 212123012130 in words is "two hundred twelve billion, one hundred twenty-three million, twelve thousand, one hundred thirty".