212521272940 has 12 divisors (see below), whose sum is σ = 446294673216. Its totient is φ = 85008509168.

The previous prime is 212521272893. The next prime is 212521273043. The reversal of 212521272940 is 49272125212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 212521272940.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5313031804 + ... + 5313031843.

It is an arithmetic number, because the mean of its divisors is an integer number (37191222768).

Almost surely, 2^212521272940 is an apocalyptic number.

212521272940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212521272940 is an abundant number, since it is smaller than the sum of its proper divisors (233773400276).

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

212521272940 is a wasteful number, since it uses less digits than its factorization.

212521272940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10626063656 (or 10626063654 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 212521272940 in words is "two hundred twelve billion, five hundred twenty-one million, two hundred seventy-two thousand, nine hundred forty".