212112223020 has 120 divisors (see below), whose sum is σ = 671992575408. Its totient is φ = 56003184000.

The previous prime is 212112223019. The next prime is 212112223031. The reversal of 212112223020 is 20322211212.

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 = 212112222984 and 212112223002.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 484566 + ... + 811805.

Almost surely, 2^212112223020 is an apocalyptic number.

212112223020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212112223020 is an abundant number, since it is smaller than the sum of its proper divisors (459880352388).

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

212112223020 is a wasteful number, since it uses less digits than its factorization.

212112223020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296493 (or 1296482 counting only the distinct ones).

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

Adding to 212112223020 its reverse (20322211212), we get a palindrome (232434434232).

The spelling of 212112223020 in words is "two hundred twelve billion, one hundred twelve million, two hundred twenty-three thousand, twenty".