121310134343123 has 16 divisors (see below), whose sum is σ = 132540518132352. Its totient is φ = 110113469400000.

The previous prime is 121310134343119. The next prime is 121310134343179. The reversal of 121310134343123 is 321343431013121.

It is not a de Polignac number, because 121310134343123 - 2² = 121310134343119 is a prime.

It is a super-2 number, since 2×121310134343123² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121310134343123.

It is not an unprimeable number, because it can be changed into a prime (121310134343623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119484623 + ... + 120495623.

It is an arithmetic number, because the mean of its divisors is an integer number (8283782383272).

Almost surely, 2^{121310134343123} is an apocalyptic number.

121310134343123 is a deficient number, since it is larger than the sum of its proper divisors (11230383789229).

121310134343123 is a wasteful number, since it uses less digits than its factorization.

121310134343123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027666.

The product of its (nonzero) digits is 15552, while the sum is 32.

Adding to 121310134343123 its reverse (321343431013121), we get a palindrome (442653565356244).

The spelling of 121310134343123 in words is "one hundred twenty-one trillion, three hundred ten billion, one hundred thirty-four million, three hundred forty-three thousand, one hundred twenty-three".