100231121554 has 16 divisors (see below), whose sum is σ = 150594638040. Its totient is φ = 50032944000.

The previous prime is 100231121539. The next prime is 100231121579. The reversal of 100231121554 is 455121132001.

It can be written as a sum of positive squares in 4 ways, for example, as 21104244529 + 79126877025 = 145273^2 + 281295^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11131054 + ... + 11140054.

Almost surely, 2^100231121554 is an apocalyptic number.

100231121554 is a deficient number, since it is larger than the sum of its proper divisors (50363516486).

100231121554 is an equidigital number, since it uses as much as digits as its factorization.

100231121554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17565.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 100231121554 its reverse (455121132001), we get a palindrome (555352253555).

The spelling of 100231121554 in words is "one hundred billion, two hundred thirty-one million, one hundred twenty-one thousand, five hundred fifty-four".