21075170612 has 12 divisors (see below), whose sum is σ = 36882888000. Its totient is φ = 10537202616.

The previous prime is 21075170593. The next prime is 21075170639. The reversal of 21075170612 is 21607157012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54389 + ... + 212387.

It is an arithmetic number, because the mean of its divisors is an integer number (3073574000).

Almost surely, 2^21075170612 is an apocalyptic number.

It is an amenable number.

21075170612 is a deficient number, since it is larger than the sum of its proper divisors (15807717388).

21075170612 is a wasteful number, since it uses less digits than its factorization.

21075170612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191350 (or 191348 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 32.

The spelling of 21075170612 in words is "twenty-one billion, seventy-five million, one hundred seventy thousand, six hundred twelve".