212657756212 has 48 divisors (see below), whose sum is σ = 408239358912. Its totient is φ = 96125863680.

The previous prime is 212657756173. The next prime is 212657756231.

212657756212 is nontrivially palindromic in base 10.

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 15 ways as a sum of consecutive naturals, for example, 23511763 + ... + 23520805.

It is an arithmetic number, because the mean of its divisors is an integer number (8504986644).

Almost surely, 2^212657756212 is an apocalyptic number.

212657756212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212657756212 is a deficient number, since it is larger than the sum of its proper divisors (195581602700).

212657756212 is a wasteful number, since it uses less digits than its factorization.

212657756212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11968 (or 11966 counting only the distinct ones).

The product of its digits is 705600, while the sum is 46.

It can be divided in two parts, 212657 and 756212, that added together give a palindrome (968869).

The spelling of 212657756212 in words is "two hundred twelve billion, six hundred fifty-seven million, seven hundred fifty-six thousand, two hundred twelve".