212322121020 has 48 divisors (see below), whose sum is σ = 660557711520. Its totient is φ = 56619232128.

The previous prime is 212322121019. The next prime is 212322121073. The reversal of 212322121020 is 20121223212.

212322121020 is a `hidden beast` number, since 212 + 3 + 221 + 210 + 20 = 666.

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 = 212322120984 and 212322121002.

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, 196594017 + ... + 196595096.

It is an arithmetic number, because the mean of its divisors is an integer number (13761618990).

Almost surely, 2^212322121020 is an apocalyptic number.

212322121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212322121020 is an abundant number, since it is smaller than the sum of its proper divisors (448235590500).

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

212322121020 is a wasteful number, since it uses less digits than its factorization.

212322121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393189131 (or 393189123 counting only the distinct ones).

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

Adding to 212322121020 its reverse (20121223212), we get a palindrome (232443344232).

The spelling of 212322121020 in words is "two hundred twelve billion, three hundred twenty-two million, one hundred twenty-one thousand, twenty".