123051142345421 has 16 divisors (see below), whose sum is σ = 124674367708800. Its totient is φ = 121436188536000.

The previous prime is 123051142345361. The next prime is 123051142345441. The reversal of 123051142345421 is 124543241150321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123051142345421 is a prime.

It is a super-2 number, since 2×123051142345421² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123051142345441) 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, 1113519671 + ... + 1113630171.

It is an arithmetic number, because the mean of its divisors is an integer number (7792147981800).

Almost surely, 2^{123051142345421} is an apocalyptic number.

It is an amenable number.

123051142345421 is a deficient number, since it is larger than the sum of its proper divisors (1623225363379).

123051142345421 is a wasteful number, since it uses less digits than its factorization.

123051142345421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147796.

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 123051142345421 its reverse (124543241150321), we get a palindrome (247594383495742).

The spelling of 123051142345421 in words is "one hundred twenty-three trillion, fifty-one billion, one hundred forty-two million, three hundred forty-five thousand, four hundred twenty-one".