121090123 has 24 divisors (see below), whose sum is σ = 158644224. Its totient is φ = 91299600.

The previous prime is 121090103. The next prime is 121090141. The reversal of 121090123 is 321090121.

It is not a de Polignac number, because 121090123 - 2⁵ = 121090091 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121090123.

It is not an unprimeable number, because it can be changed into a prime (121090103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13086 + ... + 20332.

It is an arithmetic number, because the mean of its divisors is an integer number (6610176).

Almost surely, 2^121090123 is an apocalyptic number.

121090123 is a deficient number, since it is larger than the sum of its proper divisors (37554101).

121090123 is a wasteful number, since it uses less digits than its factorization.

121090123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7303 (or 7296 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 121090123 is about 11004.0957374970. The cubic root of 121090123 is about 494.7315117120.

The spelling of 121090123 in words is "one hundred twenty-one million, ninety thousand, one hundred twenty-three".