212137220502 has 12 divisors (see below), whose sum is σ = 459630644460. Its totient is φ = 70712406828.

The previous prime is 212137220497. The next prime is 212137220521. The reversal of 212137220502 is 205022731212.

212137220502 is a `hidden beast` number, since 2 + 1 + 2 + 137 + 2 + 20 + 502 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5892700552 + ... + 5892700587.

It is an arithmetic number, because the mean of its divisors is an integer number (38302553705).

Almost surely, 2^212137220502 is an apocalyptic number.

212137220502 is an abundant number, since it is smaller than the sum of its proper divisors (247493423958).

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

212137220502 is a wasteful number, since it uses less digits than its factorization.

212137220502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11785401147 (or 11785401144 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

Adding to 212137220502 its reverse (205022731212), we get a palindrome (417159951714).

The spelling of 212137220502 in words is "two hundred twelve billion, one hundred thirty-seven million, two hundred twenty thousand, five hundred two".