212021999975 has 12 divisors (see below), whose sum is σ = 274338032016. Its totient is φ = 162242921280.

The previous prime is 212021999927. The next prime is 212021999977. The reversal of 212021999975 is 579999120212.

It is not a de Polignac number, because 212021999975 - 2²⁶ = 211954891111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212021999975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021999977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184366382 + ... + 184367531.

It is an arithmetic number, because the mean of its divisors is an integer number (22861502668).

Almost surely, 2^212021999975 is an apocalyptic number.

212021999975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

212021999975 is a deficient number, since it is larger than the sum of its proper divisors (62316032041).

212021999975 is a wasteful number, since it uses less digits than its factorization.

212021999975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368733946 (or 368733941 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 56.

The spelling of 212021999975 in words is "two hundred twelve billion, twenty-one million, nine hundred ninety-nine thousand, nine hundred seventy-five".