212112520 has 32 divisors (see below), whose sum is σ = 481723200. Its totient is φ = 84050368.

The previous prime is 212112503. The next prime is 212112521. The reversal of 212112520 is 25211212.

It is a happy number.

It is a super-2 number, since 2×212112520² = 89983442281500800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212112494 and 212112503.

It is not an unprimeable number, because it can be changed into a prime (212112521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20500 + ... + 29059.

It is an arithmetic number, because the mean of its divisors is an integer number (15053850).

Almost surely, 2^212112520 is an apocalyptic number.

212112520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212112520 is an abundant number, since it is smaller than the sum of its proper divisors (269610680).

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

212112520 is a wasteful number, since it uses less digits than its factorization.

212112520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49677 (or 49673 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 212112520 is about 14564.0832186582. The cubic root of 212112520 is about 596.3786687202.

Adding to 212112520 its reverse (25211212), we get a palindrome (237323732).

It can be divided in two parts, 2121 and 12520, that added together give a palindrome (14641).

The spelling of 212112520 in words is "two hundred twelve million, one hundred twelve thousand, five hundred twenty".