121932890 has 16 divisors (see below), whose sum is σ = 229022208. Its totient is φ = 46652496.

The previous prime is 121932887. The next prime is 121932901. The reversal of 121932890 is 98239121.

It is a self number, because there is not a number n which added to its sum of digits gives 121932890.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264842 + ... + 265301.

It is an arithmetic number, because the mean of its divisors is an integer number (14313888).

Almost surely, 2^121932890 is an apocalyptic number.

121932890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121932890 is a deficient number, since it is larger than the sum of its proper divisors (107089318).

121932890 is a wasteful number, since it uses less digits than its factorization.

121932890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530173.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 121932890 is about 11042.3226723366. The cubic root of 121932890 is about 495.8766087659.

The spelling of 121932890 in words is "one hundred twenty-one million, nine hundred thirty-two thousand, eight hundred ninety".