212251212056 has 48 divisors (see below), whose sum is σ = 452328534000. Its totient is φ = 92806181568.

The previous prime is 212251212023. The next prime is 212251212067. The reversal of 212251212056 is 650212152212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2789156 + ... + 2864243.

It is an arithmetic number, because the mean of its divisors is an integer number (9423511125).

Almost surely, 2^212251212056 is an apocalyptic number.

212251212056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

212251212056 is an abundant number, since it is smaller than the sum of its proper divisors (240077321944).

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

212251212056 is a wasteful number, since it uses less digits than its factorization.

212251212056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5653456 (or 5653433 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 212251212056 its reverse (650212152212), we get a palindrome (862463364268).

The spelling of 212251212056 in words is "two hundred twelve billion, two hundred fifty-one million, two hundred twelve thousand, fifty-six".