121475220 has 24 divisors (see below), whose sum is σ = 340130784. Its totient is φ = 32393376.

The previous prime is 121475201. The next prime is 121475243. The reversal of 121475220 is 22574121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012234 + ... + 1012353.

It is an arithmetic number, because the mean of its divisors is an integer number (14172116).

Almost surely, 2^121475220 is an apocalyptic number.

121475220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121475220 is an abundant number, since it is smaller than the sum of its proper divisors (218655564).

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

121475220 is a wasteful number, since it uses less digits than its factorization.

121475220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024599 (or 2024597 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 121475220 is about 11021.5797415797. The cubic root of 121475220 is about 495.2554135398.

The spelling of 121475220 in words is "one hundred twenty-one million, four hundred seventy-five thousand, two hundred twenty".