100131223278 has 16 divisors (see below), whose sum is σ = 205146896976. Its totient is φ = 32562999360.

The previous prime is 100131223261. The next prime is 100131223279. The reversal of 100131223278 is 872322131001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100131223279) by changing a digit.

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, 203518501 + ... + 203518992.

It is an arithmetic number, because the mean of its divisors is an integer number (12821681061).

Almost surely, 2^100131223278 is an apocalyptic number.

100131223278 is an abundant number, since it is smaller than the sum of its proper divisors (105015673698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100131223278 is a wasteful number, since it uses less digits than its factorization.

100131223278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407037539.

The product of its (nonzero) digits is 4032, while the sum is 30.

Adding to 100131223278 its reverse (872322131001), we get a palindrome (972453354279).

The spelling of 100131223278 in words is "one hundred billion, one hundred thirty-one million, two hundred twenty-three thousand, two hundred seventy-eight".