121090523 has 4 divisors (see below), whose sum is σ = 121135848. Its totient is φ = 121045200.

The previous prime is 121090511. The next prime is 121090547. The reversal of 121090523 is 325090121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325090121 = 1823 ⋅178327.

It is a cyclic number.

It is not a de Polignac number, because 121090523 - 2¹⁰ = 121089499 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121092523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18386 + ... + 24087.

It is an arithmetic number, because the mean of its divisors is an integer number (30283962).

Almost surely, 2^121090523 is an apocalyptic number.

121090523 is a deficient number, since it is larger than the sum of its proper divisors (45325).

121090523 is an equidigital number, since it uses as much as digits as its factorization.

121090523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45324.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 121090523 is about 11004.1139125329. The cubic root of 121090523 is about 494.7320564644.

The spelling of 121090523 in words is "one hundred twenty-one million, ninety thousand, five hundred twenty-three".