212021113005 has 80 divisors (see below), whose sum is σ = 412292455344. Its totient is φ = 103617377280.

The previous prime is 212021112997. The next prime is 212021113021. The reversal of 212021113005 is 500311120212.

It can be written as a sum of positive squares in 8 ways, for example, as 2552876676 + 209468236329 = 50526^2 + 457677^2 .

It is not a de Polignac number, because 212021113005 - 2³ = 212021112997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 574335 + ... + 868275.

Almost surely, 2^212021113005 is an apocalyptic number.

It is an amenable number.

212021113005 is a deficient number, since it is larger than the sum of its proper divisors (200271342339).

212021113005 is a wasteful number, since it uses less digits than its factorization.

212021113005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294108 (or 294099 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 212021113005 its reverse (500311120212), we get a palindrome (712332233217).

The spelling of 212021113005 in words is "two hundred twelve billion, twenty-one million, one hundred thirteen thousand, five".