121297290 has 16 divisors (see below), whose sum is σ = 291113568. Its totient is φ = 32345936.

The previous prime is 121297289. The next prime is 121297301. The reversal of 121297290 is 92792121.

It is a super-2 number, since 2×121297290² = 29426065122688200, which contains 22 as substring.

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, 2021592 + ... + 2021651.

It is an arithmetic number, because the mean of its divisors is an integer number (18194598).

Almost surely, 2^121297290 is an apocalyptic number.

121297290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121297290 is an abundant number, since it is smaller than the sum of its proper divisors (169816278).

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

121297290 is a wasteful number, since it uses less digits than its factorization.

121297290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043253.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 121297290 is about 11013.5048917227. The cubic root of 121297290 is about 495.0134880520.

The spelling of 121297290 in words is "one hundred twenty-one million, two hundred ninety-seven thousand, two hundred ninety".