100421263551 has 32 divisors (see below), whose sum is σ = 157266160128. Its totient is φ = 55801474560.

The previous prime is 100421263541. The next prime is 100421263627. The reversal of 100421263551 is 155362124001.

It is not a de Polignac number, because 100421263551 - 2²⁵ = 100387709119 is a prime.

It is a super-2 number, since 2×100421263551² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421263541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74371 + ... + 454283.

It is an arithmetic number, because the mean of its divisors is an integer number (4914567504).

Almost surely, 2^100421263551 is an apocalyptic number.

100421263551 is a deficient number, since it is larger than the sum of its proper divisors (56844896577).

100421263551 is a wasteful number, since it uses less digits than its factorization.

100421263551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380271.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 100421263551 its reverse (155362124001), we get a palindrome (255783387552).

The spelling of 100421263551 in words is "one hundred billion, four hundred twenty-one million, two hundred sixty-three thousand, five hundred fifty-one".