100401100781251 has 4 divisors (see below), whose sum is σ = 100401853022352. Its totient is φ = 100400348540152.

The previous prime is 100401100781167. The next prime is 100401100781273. The reversal of 100401100781251 is 152187001104001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100401100781251 - 2²⁵ = 100401067226819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100401100781291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375920311 + ... + 376187296.

It is an arithmetic number, because the mean of its divisors is an integer number (25100463255588).

Almost surely, 2^{100401100781251} is an apocalyptic number.

100401100781251 is a deficient number, since it is larger than the sum of its proper divisors (752241101).

100401100781251 is an equidigital number, since it uses as much as digits as its factorization.

100401100781251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752241100.

The product of its (nonzero) digits is 2240, while the sum is 31.

Adding to 100401100781251 its reverse (152187001104001), we get a palindrome (252588101885252).

The spelling of 100401100781251 in words is "one hundred trillion, four hundred one billion, one hundred million, seven hundred eighty-one thousand, two hundred fifty-one".