123421221302432 has 12 divisors (see below), whose sum is σ = 242985529439226. Its totient is φ = 61710610651200.

The previous prime is 123421221302359. The next prime is 123421221302441. The reversal of 123421221302432 is 234203122124321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 101800916046736 + 21620305255696 = 10089644^2 + 4649764^2 .

It is a super-2 number, since 2×123421221302432² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 3856913165701 = 123421221302432 / (1 + 2 + 3 + 4 + 2 + 1 + 2 + 2 + 1 + 3 + 0 + 2 + 4 + 3 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1928456582819 + ... + 1928456582882.

Almost surely, 2^{123421221302432} is an apocalyptic number.

It is an amenable number.

123421221302432 is a deficient number, since it is larger than the sum of its proper divisors (119564308136794).

123421221302432 is an equidigital number, since it uses as much as digits as its factorization.

123421221302432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856913165711 (or 3856913165703 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 123421221302432 its reverse (234203122124321), we get a palindrome (357624343426753).

The spelling of 123421221302432 in words is "one hundred twenty-three trillion, four hundred twenty-one billion, two hundred twenty-one million, three hundred two thousand, four hundred thirty-two".