212113220 has 24 divisors (see below), whose sum is σ = 485932608. Its totient is φ = 77132000.

The previous prime is 212113219. The next prime is 212113229. The reversal of 212113220 is 22311212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 212113195 and 212113204.

It is not an unprimeable number, because it can be changed into a prime (212113229) 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, 481856 + ... + 482295.

It is an arithmetic number, because the mean of its divisors is an integer number (20247192).

Almost surely, 2^212113220 is an apocalyptic number.

212113220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212113220 is an abundant number, since it is smaller than the sum of its proper divisors (273819388).

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

212113220 is a wasteful number, since it uses less digits than its factorization.

212113220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964171 (or 964169 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 212113220 is about 14564.1072503604. The cubic root of 212113220 is about 596.3793247629.

Adding to 212113220 its reverse (22311212), we get a palindrome (234424432).

The spelling of 212113220 in words is "two hundred twelve million, one hundred thirteen thousand, two hundred twenty".