21415355102512 has 40 divisors (see below), whose sum is σ = 50209109866656. Its totient is φ = 8638126427136.

The previous prime is 21415355102507. The next prime is 21415355102527. The reversal of 21415355102512 is 21520155351412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5623778323 + ... + 5623782130.

Almost surely, 2^{21415355102512} is an apocalyptic number.

It is an amenable number.

21415355102512 is an abundant number, since it is smaller than the sum of its proper divisors (28793754764144).

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

21415355102512 is a wasteful number, since it uses less digits than its factorization.

21415355102512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11247560485 (or 11247560479 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 37.

The spelling of 21415355102512 in words is "twenty-one trillion, four hundred fifteen billion, three hundred fifty-five million, one hundred two thousand, five hundred twelve".