121313242231 has 4 divisors (see below), whose sum is σ = 121316695864. Its totient is φ = 121309788600.

The previous prime is 121313242229. The next prime is 121313242243. The reversal of 121313242231 is 132242313121.

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 121313242231 - 2¹ = 121313242229 is a prime.

It is a super-2 number, since 2×121313242231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121313242196 and 121313242205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313242201) 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, 1673580 + ... + 1744561.

It is an arithmetic number, because the mean of its divisors is an integer number (30329173966).

Almost surely, 2^121313242231 is an apocalyptic number.

121313242231 is a deficient number, since it is larger than the sum of its proper divisors (3453633).

121313242231 is an equidigital number, since it uses as much as digits as its factorization.

121313242231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3453632.

The product of its digits is 1728, while the sum is 25.

Adding to 121313242231 its reverse (132242313121), we get a palindrome (253555555352).

The spelling of 121313242231 in words is "one hundred twenty-one billion, three hundred thirteen million, two hundred forty-two thousand, two hundred thirty-one".