212320817995 has 64 divisors (see below), whose sum is σ = 311986741248. Its totient is φ = 136598400000.

The previous prime is 212320817941. The next prime is 212320818001. The reversal of 212320817995 is 599718023212.

It is not a de Polignac number, because 212320817995 - 2¹⁷ = 212320686923 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2236495 + ... + 2329495.

It is an arithmetic number, because the mean of its divisors is an integer number (4874792832).

Almost surely, 2^212320817995 is an apocalyptic number.

212320817995 is a deficient number, since it is larger than the sum of its proper divisors (99665923253).

212320817995 is a wasteful number, since it uses less digits than its factorization.

212320817995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93164.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 212320817995 in words is "two hundred twelve billion, three hundred twenty million, eight hundred seventeen thousand, nine hundred ninety-five".