212102122020 has 48 divisors (see below), whose sum is σ = 625143099840. Its totient is φ = 53583693696.

The previous prime is 212102122007. The next prime is 212102122051. The reversal of 212102122020 is 20221201212.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 93026107 + ... + 93028386.

It is an arithmetic number, because the mean of its divisors is an integer number (13023814580).

Almost surely, 2^212102122020 is an apocalyptic number.

212102122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212102122020 is an abundant number, since it is smaller than the sum of its proper divisors (413040977820).

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

212102122020 is a wasteful number, since it uses less digits than its factorization.

212102122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186054524 (or 186054522 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212102122020 its reverse (20221201212), we get a palindrome (232323323232).

The spelling of 212102122020 in words is "two hundred twelve billion, one hundred two million, one hundred twenty-two thousand, twenty".