212635221426 has 12 divisors (see below), whose sum is σ = 460709646462. Its totient is φ = 70878407136.

The previous prime is 212635221391. The next prime is 212635221457. The reversal of 212635221426 is 624122536212.

212635221426 is a `hidden beast` number, since 2 + 1 + 2 + 6 + 3 + 5 + 221 + 426 = 666.

212635221426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 110779137225 + 101856084201 = 332835^2 + 319149^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5906533911 + ... + 5906533946.

Almost surely, 2^212635221426 is an apocalyptic number.

212635221426 is an abundant number, since it is smaller than the sum of its proper divisors (248074425036).

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

212635221426 is a wasteful number, since it uses less digits than its factorization.

212635221426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11813067865 (or 11813067862 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

Adding to 212635221426 its reverse (624122536212), we get a palindrome (836757757638).

The spelling of 212635221426 in words is "two hundred twelve billion, six hundred thirty-five million, two hundred twenty-one thousand, four hundred twenty-six".