123421231222042 has 64 divisors (see below), whose sum is σ = 218487572704800. Its totient is φ = 51738600775680.

The previous prime is 123421231222027. The next prime is 123421231222057. The reversal of 123421231222042 is 240222132124321.

It is an interprime number because it is at equal distance from previous prime (123421231222027) and next prime (123421231222057).

It can be written as a sum of positive squares in 16 ways, for example, as 18744821361841 + 104676409860201 = 4329529^2 + 10231149^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123421231221995 and 123421231222013.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 23634942 + ... + 28380502.

Almost surely, 2^{123421231222042} is an apocalyptic number.

123421231222042 is a deficient number, since it is larger than the sum of its proper divisors (95066341482758).

123421231222042 is a wasteful number, since it uses less digits than its factorization.

123421231222042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4747651.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 123421231222042 its reverse (240222132124321), we get a palindrome (363643363346363).

The spelling of 123421231222042 in words is "one hundred twenty-three trillion, four hundred twenty-one billion, two hundred thirty-one million, two hundred twenty-two thousand, forty-two".