121131123 has 4 divisors (see below), whose sum is σ = 161508168. Its totient is φ = 80754080.

The previous prime is 121131121. The next prime is 121131149. The reversal of 121131123 is 321131121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321131121 = 3 ⋅107043707.

It is a cyclic number.

It is not a de Polignac number, because 121131123 - 2¹ = 121131121 is a prime.

It is a super-2 number, since 2×121131123² = 29345497918482258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121131121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20188518 + ... + 20188523.

It is an arithmetic number, because the mean of its divisors is an integer number (40377042).

Almost surely, 2^121131123 is an apocalyptic number.

121131123 is a deficient number, since it is larger than the sum of its proper divisors (40377045).

121131123 is an equidigital number, since it uses as much as digits as its factorization.

121131123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40377044.

The product of its digits is 36, while the sum is 15.

The square root of 121131123 is about 11005.9585225459. The cubic root of 121131123 is about 494.7873425884.

Adding to 121131123 its reverse (321131121), we get a palindrome (442262244).

The spelling of 121131123 in words is "one hundred twenty-one million, one hundred thirty-one thousand, one hundred twenty-three".