212221020120 has 64 divisors (see below), whose sum is σ = 637348716000. Its totient is φ = 56531324928.

The previous prime is 212221020071. The next prime is 212221020169. The reversal of 212221020120 is 21020122212.

It is an interprime number because it is at equal distance from previous prime (212221020071) and next prime (212221020169).

It is a super-2 number, since 2×212221020120² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212221020120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 840355 + ... + 1063314.

Almost surely, 2^212221020120 is an apocalyptic number.

212221020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212221020120 is an abundant number, since it is smaller than the sum of its proper divisors (425127695880).

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

212221020120 is a wasteful number, since it uses less digits than its factorization.

212221020120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904612 (or 1904608 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212221020120 its reverse (21020122212), we get a palindrome (233241142332).

The spelling of 212221020120 in words is "two hundred twelve billion, two hundred twenty-one million, twenty thousand, one hundred twenty".