121166520 has 64 divisors (see below), whose sum is σ = 364245120. Its totient is φ = 32244864.

The previous prime is 121166519. The next prime is 121166537. The reversal of 121166520 is 25661121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93799 + ... + 95081.

It is an arithmetic number, because the mean of its divisors is an integer number (5691330).

Almost surely, 2^121166520 is an apocalyptic number.

121166520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121166520 is an abundant number, since it is smaller than the sum of its proper divisors (243078600).

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

121166520 is a wasteful number, since it uses less digits than its factorization.

121166520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084 (or 2080 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 121166520 is about 11007.5664885569. The cubic root of 121166520 is about 494.8355335665.

The spelling of 121166520 in words is "one hundred twenty-one million, one hundred sixty-six thousand, five hundred twenty".