121099351 has 4 divisors (see below), whose sum is σ = 122906872. Its totient is φ = 119291832.

The previous prime is 121099339. The next prime is 121099397. The reversal of 121099351 is 153990121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121099351 - 2¹⁷ = 120968279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121099651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 903660 + ... + 903793.

It is an arithmetic number, because the mean of its divisors is an integer number (30726718).

Almost surely, 2^121099351 is an apocalyptic number.

121099351 is a deficient number, since it is larger than the sum of its proper divisors (1807521).

121099351 is an equidigital number, since it uses as much as digits as its factorization.

121099351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807520.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 121099351 is about 11004.5150279329. The cubic root of 121099351 is about 494.7440788433.

The spelling of 121099351 in words is "one hundred twenty-one million, ninety-nine thousand, three hundred fifty-one".