212135224356 has 72 divisors (see below), whose sum is σ = 590770934208. Its totient is φ = 63646920000.

The previous prime is 212135224351. The next prime is 212135224381. The reversal of 212135224356 is 653422531212.

212135224356 is a `hidden beast` number, since 2 + 1 + 213 + 5 + 2 + 2 + 435 + 6 = 666.

212135224356 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212135224356² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 212135224356.

It is not an unprimeable number, because it can be changed into a prime (212135224351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2611960 + ... + 2691951.

It is an arithmetic number, because the mean of its divisors is an integer number (8205151864).

Almost surely, 2^212135224356 is an apocalyptic number.

It is an amenable number.

212135224356 is an abundant number, since it is smaller than the sum of its proper divisors (378635709852).

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

212135224356 is a wasteful number, since it uses less digits than its factorization.

212135224356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5304033 (or 5304028 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

Adding to 212135224356 its reverse (653422531212), we get a palindrome (865557755568).

The spelling of 212135224356 in words is "two hundred twelve billion, one hundred thirty-five million, two hundred twenty-four thousand, three hundred fifty-six".