100421266665 has 32 divisors (see below), whose sum is σ = 164396560896. Its totient is φ = 52321386240.

The previous prime is 100421266639. The next prime is 100421266691. The reversal of 100421266665 is 566662124001.

It is an interprime number because it is at equal distance from previous prime (100421266639) and next prime (100421266691).

It is not a de Polignac number, because 100421266665 - 2⁵ = 100421266633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 249759 + ... + 513051.

It is an arithmetic number, because the mean of its divisors is an integer number (5137392528).

Almost surely, 2^100421266665 is an apocalyptic number.

100421266665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100421266665 is a deficient number, since it is larger than the sum of its proper divisors (63975294231).

100421266665 is a wasteful number, since it uses less digits than its factorization.

100421266665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263889.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 100421266665 in words is "one hundred billion, four hundred twenty-one million, two hundred sixty-six thousand, six hundred sixty-five".