123121421143 has 32 divisors (see below), whose sum is σ = 149402419200. Its totient is φ = 99111255264.

The previous prime is 123121421113. The next prime is 123121421161. The reversal of 123121421143 is 341124121321.

It is not a de Polignac number, because 123121421143 - 2²¹ = 123119323991 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 (123121421113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30182178 + ... + 30186256.

It is an arithmetic number, because the mean of its divisors is an integer number (4668825600).

Almost surely, 2^123121421143 is an apocalyptic number.

123121421143 is a deficient number, since it is larger than the sum of its proper divisors (26280998057).

123121421143 is a wasteful number, since it uses less digits than its factorization.

123121421143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6019.

The product of its digits is 1152, while the sum is 25.

Adding to 123121421143 its reverse (341124121321), we get a palindrome (464245542464).

The spelling of 123121421143 in words is "one hundred twenty-three billion, one hundred twenty-one million, four hundred twenty-one thousand, one hundred forty-three".