121331123 has 4 divisors (see below), whose sum is σ = 122867040. Its totient is φ = 119795208.

The previous prime is 121331113. The next prime is 121331153. The reversal of 121331123 is 321133121.

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 121331123 - 2⁴ = 121331107 is a prime.

It is a super-2 number, since 2×121331123² = 29442482816882258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121331113) 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, 767840 + ... + 767997.

It is an arithmetic number, because the mean of its divisors is an integer number (30716760).

Almost surely, 2^121331123 is an apocalyptic number.

121331123 is a deficient number, since it is larger than the sum of its proper divisors (1535917).

121331123 is an equidigital number, since it uses as much as digits as its factorization.

121331123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535916.

The product of its digits is 108, while the sum is 17.

The square root of 121331123 is about 11015.0407625210. The cubic root of 121331123 is about 495.0595078613.

Adding to 121331123 its reverse (321133121), we get a palindrome (442464244).

The spelling of 121331123 in words is "one hundred twenty-one million, three hundred thirty-one thousand, one hundred twenty-three".