121675820 has 48 divisors (see below), whose sum is σ = 297998400. Its totient is φ = 41715072.

The previous prime is 121675789. The next prime is 121675843. The reversal of 121675820 is 28576121.

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, 2009 + ... + 15728.

It is an arithmetic number, because the mean of its divisors is an integer number (6208300).

Almost surely, 2^121675820 is an apocalyptic number.

121675820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121675820 is an abundant number, since it is smaller than the sum of its proper divisors (176322580).

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

121675820 is a wasteful number, since it uses less digits than its factorization.

121675820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17767 (or 17751 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 121675820 is about 11030.6763165275. The cubic root of 121675820 is about 495.5278795328.

The spelling of 121675820 in words is "one hundred twenty-one million, six hundred seventy-five thousand, eight hundred twenty".