121908501 has 24 divisors (see below), whose sum is σ = 206877216. Its totient is φ = 68199840.

The previous prime is 121908499. The next prime is 121908529. The reversal of 121908501 is 105809121.

It is not a de Polignac number, because 121908501 - 2¹ = 121908499 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121908571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46075 + ... + 48648.

It is an arithmetic number, because the mean of its divisors is an integer number (8619884).

Almost surely, 2^121908501 is an apocalyptic number.

121908501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121908501 is a deficient number, since it is larger than the sum of its proper divisors (84968715).

121908501 is a wasteful number, since it uses less digits than its factorization.

121908501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94753 (or 94750 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 121908501 is about 11041.2182751724. The cubic root of 121908501 is about 495.8435448375.

The spelling of 121908501 in words is "one hundred twenty-one million, nine hundred eight thousand, five hundred one".