123450442154421 has 4 divisors (see below), whose sum is σ = 164600589539232. Its totient is φ = 82300294769612.

The previous prime is 123450442154393. The next prime is 123450442154437. The reversal of 123450442154421 is 124451244054321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123450442154421 - 2¹⁵ = 123450442121653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123450442154471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20575073692401 + ... + 20575073692406.

It is an arithmetic number, because the mean of its divisors is an integer number (41150147384808).

Almost surely, 2^{123450442154421} is an apocalyptic number.

It is an amenable number.

123450442154421 is a deficient number, since it is larger than the sum of its proper divisors (41150147384811).

123450442154421 is an equidigital number, since it uses as much as digits as its factorization.

123450442154421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41150147384810.

The product of its (nonzero) digits is 614400, while the sum is 42.

The spelling of 123450442154421 in words is "one hundred twenty-three trillion, four hundred fifty billion, four hundred forty-two million, one hundred fifty-four thousand, four hundred twenty-one".