100231209978 has 64 divisors (see below), whose sum is σ = 213044428800. Its totient is φ = 31385059200.

The previous prime is 100231209943. The next prime is 100231209983. The reversal of 100231209978 is 879902132001.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1484551 + ... + 1550597.

It is an arithmetic number, because the mean of its divisors is an integer number (3328819200).

Almost surely, 2^100231209978 is an apocalyptic number.

100231209978 is an abundant number, since it is smaller than the sum of its proper divisors (112813218822).

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

100231209978 is a wasteful number, since it uses less digits than its factorization.

100231209978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66323.

The product of its (nonzero) digits is 54432, while the sum is 42.

The spelling of 100231209978 in words is "one hundred billion, two hundred thirty-one million, two hundred nine thousand, nine hundred seventy-eight".