121291730 has 32 divisors (see below), whose sum is σ = 250093440. Its totient is φ = 41489280.

The previous prime is 121291699. The next prime is 121291769. The reversal of 121291730 is 37192121.

It is a self number, because there is not a number n which added to its sum of digits gives 121291730.

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, 32606 + ... + 36134.

It is an arithmetic number, because the mean of its divisors is an integer number (7815420).

Almost surely, 2^121291730 is an apocalyptic number.

121291730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121291730 is an abundant number, since it is smaller than the sum of its proper divisors (128801710).

121291730 is a wasteful number, since it uses less digits than its factorization.

121291730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 121291730 is about 11013.2524714546. The cubic root of 121291730 is about 495.0059244946.

The spelling of 121291730 in words is "one hundred twenty-one million, two hundred ninety-one thousand, seven hundred thirty".