21143070371975 has 24 divisors (see below), whose sum is σ = 26712521351712. Its totient is φ = 16595038512000.

The previous prime is 21143070371971. The next prime is 21143070371989. The reversal of 21143070371975 is 57917307034112.

It is not a de Polignac number, because 21143070371975 - 2² = 21143070371971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143070371971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120356054 + ... + 120531596.

It is an arithmetic number, because the mean of its divisors is an integer number (1113021722988).

Almost surely, 2^{21143070371975} is an apocalyptic number.

21143070371975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21143070371975 is a deficient number, since it is larger than the sum of its proper divisors (5569450979737).

21143070371975 is a wasteful number, since it uses less digits than its factorization.

21143070371975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266507 (or 266502 counting only the distinct ones).

The product of its (nonzero) digits is 1111320, while the sum is 50.

The spelling of 21143070371975 in words is "twenty-one trillion, one hundred forty-three billion, seventy million, three hundred seventy-one thousand, nine hundred seventy-five".