123413112551 has 4 divisors (see below), whose sum is σ = 123434972832. Its totient is φ = 123391252272.

The previous prime is 123413112533. The next prime is 123413112623. The reversal of 123413112551 is 155211314321.

It is a happy number.

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 123413112551 - 2¹⁴ = 123413096167 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 (123413112521) 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, 10921670 + ... + 10932963.

It is an arithmetic number, because the mean of its divisors is an integer number (30858743208).

Almost surely, 2^123413112551 is an apocalyptic number.

123413112551 is a deficient number, since it is larger than the sum of its proper divisors (21860281).

123413112551 is an equidigital number, since it uses as much as digits as its factorization.

123413112551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21860280.

The product of its digits is 3600, while the sum is 29.

Adding to 123413112551 its reverse (155211314321), we get a palindrome (278624426872).

The spelling of 123413112551 in words is "one hundred twenty-three billion, four hundred thirteen million, one hundred twelve thousand, five hundred fifty-one".