100421745731815 has 48 divisors (see below), whose sum is σ = 129678209006976. Its totient is φ = 74594082816000.

The previous prime is 100421745731807. The next prime is 100421745731819. The reversal of 100421745731815 is 518137547124001.

It is not a de Polignac number, because 100421745731815 - 2³ = 100421745731807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421745731819) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40989415 + ... + 43370215.

It is an arithmetic number, because the mean of its divisors is an integer number (2701629354312).

Almost surely, 2^{100421745731815} is an apocalyptic number.

100421745731815 is a deficient number, since it is larger than the sum of its proper divisors (29256463275161).

100421745731815 is a wasteful number, since it uses less digits than its factorization.

100421745731815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381320 (or 2381297 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 49.

The spelling of 100421745731815 in words is "one hundred trillion, four hundred twenty-one billion, seven hundred forty-five million, seven hundred thirty-one thousand, eight hundred fifteen".