212312122020 has 72 divisors (see below), whose sum is σ = 661419226104. Its totient is φ = 55086386688.

The previous prime is 212312122013. The next prime is 212312122039. The reversal of 212312122020 is 20221213212.

212312122020 is a `hidden beast` number, since 21 + 231 + 212 + 202 + 0 = 666.

212312122020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 98968126464 + 113343995556 = 314592^2 + 336666^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 212312121984 and 212312122002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15932689 + ... + 15946008.

Almost surely, 2^212312122020 is an apocalyptic number.

212312122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212312122020 is an abundant number, since it is smaller than the sum of its proper divisors (449107104084).

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

212312122020 is a wasteful number, since it uses less digits than its factorization.

212312122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31878749 (or 31878744 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212312122020 its reverse (20221213212), we get a palindrome (232533335232).

The spelling of 212312122020 in words is "two hundred twelve billion, three hundred twelve million, one hundred twenty-two thousand, twenty".