100201505551 has 4 divisors (see below), whose sum is σ = 114516006352. Its totient is φ = 85887004752.

The previous prime is 100201505543. The next prime is 100201505597. The reversal of 100201505551 is 155505102001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155505102001 = 20411 ⋅7618691.

It is a cyclic number.

It is not a de Polignac number, because 100201505551 - 2³ = 100201505543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100201505501) 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, 7157250390 + ... + 7157250403.

It is an arithmetic number, because the mean of its divisors is an integer number (28629001588).

Almost surely, 2^100201505551 is an apocalyptic number.

100201505551 is a deficient number, since it is larger than the sum of its proper divisors (14314500801).

100201505551 is an equidigital number, since it uses as much as digits as its factorization.

100201505551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14314500800.

The product of its (nonzero) digits is 1250, while the sum is 25.

Adding to 100201505551 its reverse (155505102001), we get a palindrome (255706607552).

The spelling of 100201505551 in words is "one hundred billion, two hundred one million, five hundred five thousand, five hundred fifty-one".