212012202020 has 24 divisors (see below), whose sum is σ = 451324608504. Its totient is φ = 83643169536.

The previous prime is 212012201923. The next prime is 212012202041. The reversal of 212012202020 is 20202210212.

It can be written as a sum of positive squares in 4 ways, for example, as 1360576996 + 210651625024 = 36886^2 + 458968^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212012201986 and 212012202004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72605459 + ... + 72608378.

It is an arithmetic number, because the mean of its divisors is an integer number (18805192021).

Almost surely, 2^212012202020 is an apocalyptic number.

212012202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212012202020 is an abundant number, since it is smaller than the sum of its proper divisors (239312406484).

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

212012202020 is a wasteful number, since it uses less digits than its factorization.

212012202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145213919 (or 145213917 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 212012202020 its reverse (20202210212), we get a palindrome (232214412232).

The spelling of 212012202020 in words is "two hundred twelve billion, twelve million, two hundred two thousand, twenty".