212657129269 has 8 divisors (see below), whose sum is σ = 231238821632. Its totient is φ = 194393072880.

The previous prime is 212657129227. The next prime is 212657129299. The reversal of 212657129269 is 962921756212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212657129269 is a prime.

It is a super-2 number, since 2×212657129269² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212657129299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79407597 + ... + 79410274.

It is an arithmetic number, because the mean of its divisors is an integer number (28904852704).

Almost surely, 2^212657129269 is an apocalyptic number.

It is an amenable number.

212657129269 is a deficient number, since it is larger than the sum of its proper divisors (18581692363).

212657129269 is a wasteful number, since it uses less digits than its factorization.

212657129269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158817987.

The product of its digits is 1632960, while the sum is 52.

The spelling of 212657129269 in words is "two hundred twelve billion, six hundred fifty-seven million, one hundred twenty-nine thousand, two hundred sixty-nine".