121313151143 has 4 divisors (see below), whose sum is σ = 122057403768. Its totient is φ = 120568898520.

The previous prime is 121313151109. The next prime is 121313151187. The reversal of 121313151143 is 341151313121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341151313121 = 4639 ⋅73539839.

It is a cyclic number.

It is not a de Polignac number, because 121313151143 - 2²⁶ = 121246042279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313151643) 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, 372126068 + ... + 372126393.

It is an arithmetic number, because the mean of its divisors is an integer number (30514350942).

Almost surely, 2^121313151143 is an apocalyptic number.

121313151143 is a deficient number, since it is larger than the sum of its proper divisors (744252625).

121313151143 is an equidigital number, since it uses as much as digits as its factorization.

121313151143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744252624.

The product of its digits is 1080, while the sum is 26.

Adding to 121313151143 its reverse (341151313121), we get a palindrome (462464464264).

The spelling of 121313151143 in words is "one hundred twenty-one billion, three hundred thirteen million, one hundred fifty-one thousand, one hundred forty-three".