21375201572312 has 128 divisors (see below), whose sum is σ = 47456098905600. Its totient is φ = 8835817955328.

The previous prime is 21375201572297. The next prime is 21375201572359. The reversal of 21375201572312 is 21327510257312.

It is a self number, because there is not a number n which added to its sum of digits gives 21375201572312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 447071864 + ... + 447119672.

It is an arithmetic number, because the mean of its divisors is an integer number (370750772700).

Almost surely, 2^{21375201572312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21375201572312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23728049452800).

21375201572312 is an abundant number, since it is smaller than the sum of its proper divisors (26080897333288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21375201572312 is a wasteful number, since it uses less digits than its factorization.

21375201572312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50185 (or 50181 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 41.

The spelling of 21375201572312 in words is "twenty-one trillion, three hundred seventy-five billion, two hundred one million, five hundred seventy-two thousand, three hundred twelve".