121131131323 has 4 divisors (see below), whose sum is σ = 121369110480. Its totient is φ = 120893152168.

The previous prime is 121131131309. The next prime is 121131131377. The reversal of 121131131323 is 323131131121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323131131121 = 1151 ⋅280739471.

It is a cyclic number.

It is not a de Polignac number, because 121131131323 - 2⁹ = 121131130811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121131131294 and 121131131303.

It is not an unprimeable number, because it can be changed into a prime (121131131923) 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, 118988815 + ... + 118989832.

It is an arithmetic number, because the mean of its divisors is an integer number (30342277620).

Almost surely, 2^121131131323 is an apocalyptic number.

121131131323 is a deficient number, since it is larger than the sum of its proper divisors (237979157).

121131131323 is an equidigital number, since it uses as much as digits as its factorization.

121131131323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237979156.

The product of its digits is 324, while the sum is 22.

Adding to 121131131323 its reverse (323131131121), we get a palindrome (444262262444).

The spelling of 121131131323 in words is "one hundred twenty-one billion, one hundred thirty-one million, one hundred thirty-one thousand, three hundred twenty-three".