100521144455 has 4 divisors (see below), whose sum is σ = 120625373352. Its totient is φ = 80416915560.

The previous prime is 100521144413. The next prime is 100521144461. The reversal of 100521144455 is 554441125001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 554441125001 = 696061 ⋅796541.

It is not a de Polignac number, because 100521144455 - 2²⁴ = 100504367239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10052114441 + ... + 10052114450.

It is an arithmetic number, because the mean of its divisors is an integer number (30156343338).

Almost surely, 2^100521144455 is an apocalyptic number.

100521144455 is a deficient number, since it is larger than the sum of its proper divisors (20104228897).

100521144455 is an equidigital number, since it uses as much as digits as its factorization.

100521144455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20104228896.

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 100521144455 its reverse (554441125001), we get a palindrome (654962269456).

The spelling of 100521144455 in words is "one hundred billion, five hundred twenty-one million, one hundred forty-four thousand, four hundred fifty-five".