121100109975 has 72 divisors (see below), whose sum is σ = 233808542240. Its totient is φ = 59562397440.

The previous prime is 121100109881. The next prime is 121100110009. The reversal of 121100109975 is 579901001121.

It is not a de Polignac number, because 121100109975 - 2⁸ = 121100109719 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3178086 + ... + 3215964.

Almost surely, 2^121100109975 is an apocalyptic number.

121100109975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121100109975 is a deficient number, since it is larger than the sum of its proper divisors (112708432265).

121100109975 is a wasteful number, since it uses less digits than its factorization.

121100109975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39001 (or 38993 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 36.

The spelling of 121100109975 in words is "one hundred twenty-one billion, one hundred million, one hundred nine thousand, nine hundred seventy-five".