100555954129 has 4 divisors (see below), whose sum is σ = 100809244084. Its totient is φ = 100302664176.

The previous prime is 100555954099. The next prime is 100555954157. The reversal of 100555954129 is 921459555001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921459555001 = 293 ⋅3144913157.

It can be written as a sum of positive squares in 2 ways, for example, as 77384112400 + 23171841729 = 278180^2 + 152223^2 .

It is a cyclic number.

It is not a de Polignac number, because 100555954129 - 2¹⁷ = 100555823057 is a prime.

It is a super-2 number, since 2×100555954129² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100555954199) 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, 126644382 + ... + 126645175.

It is an arithmetic number, because the mean of its divisors is an integer number (25202311021).

Almost surely, 2^100555954129 is an apocalyptic number.

It is an amenable number.

100555954129 is a deficient number, since it is larger than the sum of its proper divisors (253289955).

100555954129 is an equidigital number, since it uses as much as digits as its factorization.

100555954129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253289954.

The product of its (nonzero) digits is 405000, while the sum is 46.

The spelling of 100555954129 in words is "one hundred billion, five hundred fifty-five million, nine hundred fifty-four thousand, one hundred twenty-nine".