21375175124450 has 48 divisors (see below), whose sum is σ = 45598071923520. Its totient is φ = 7302735213120.

The previous prime is 21375175124441. The next prime is 21375175124483. The reversal of 21375175124450 is 5442157157312.

It is a super-2 number, since 2×21375175124450² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21375175124395 and 21375175124404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107801885 + ... + 107999984.

It is an arithmetic number, because the mean of its divisors is an integer number (949959831740).

Almost surely, 2^{21375175124450} is an apocalyptic number.

21375175124450 is an abundant number, since it is smaller than the sum of its proper divisors (24222896799070).

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

21375175124450 is a wasteful number, since it uses less digits than its factorization.

21375175124450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215802171 (or 215802166 counting only the distinct ones).

The product of its (nonzero) digits is 1176000, while the sum is 47.

The spelling of 21375175124450 in words is "twenty-one trillion, three hundred seventy-five billion, one hundred seventy-five million, one hundred twenty-four thousand, four hundred fifty".