212852378689921 has 16 divisors (see below), whose sum is σ = 220433364717568. Its totient is φ = 205316354350800.

The previous prime is 212852378689883. The next prime is 212852378689931. The reversal of 212852378689921 is 129986873258212.

It is a cyclic number.

It is not a de Polignac number, because 212852378689921 - 2¹⁹ = 212852378165633 is a prime.

It is a super-2 number, since 2×212852378689921² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212852378689931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42002326 + ... + 46796368.

It is an arithmetic number, because the mean of its divisors is an integer number (13777085294848).

Almost surely, 2^{212852378689921} is an apocalyptic number.

It is an amenable number.

212852378689921 is a deficient number, since it is larger than the sum of its proper divisors (7580986027647).

212852378689921 is a wasteful number, since it uses less digits than its factorization.

212852378689921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4798732.

The product of its digits is 418037760, while the sum is 73.

The spelling of 212852378689921 in words is "two hundred twelve trillion, eight hundred fifty-two billion, three hundred seventy-eight million, six hundred eighty-nine thousand, nine hundred twenty-one".