212021112072 has 128 divisors (see below), whose sum is σ = 682162790400. Its totient is φ = 53293939200.

The previous prime is 212021112071. The next prime is 212021112109. The reversal of 212021112072 is 270211120212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (212021112071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1793197 + ... + 1907772.

It is an arithmetic number, because the mean of its divisors is an integer number (5329396800).

Almost surely, 2^212021112072 is an apocalyptic number.

212021112072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212021112072 is an abundant number, since it is smaller than the sum of its proper divisors (470141678328).

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

212021112072 is a wasteful number, since it uses less digits than its factorization.

212021112072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701027 (or 3701023 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

Adding to 212021112072 its reverse (270211120212), we get a palindrome (482232232284).

The spelling of 212021112072 in words is "two hundred twelve billion, twenty-one million, one hundred twelve thousand, seventy-two".