123421403043402 has 32 divisors (see below), whose sum is σ = 247205866032000. Its totient is φ = 41079996776448.

The previous prime is 123421403043353. The next prime is 123421403043409. The reversal of 123421403043402 is 204340304124321.

It is not an unprimeable number, because it can be changed into a prime (123421403043409) 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, 7750474 + ... + 17518922.

It is an arithmetic number, because the mean of its divisors is an integer number (7725183313500).

Almost surely, 2^{123421403043402} is an apocalyptic number.

123421403043402 is an abundant number, since it is smaller than the sum of its proper divisors (123784462988598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123421403043402 is a wasteful number, since it uses less digits than its factorization.

123421403043402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9771550.

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 123421403043402 its reverse (204340304124321), we get a palindrome (327761707167723).

The spelling of 123421403043402 in words is "one hundred twenty-three trillion, four hundred twenty-one billion, four hundred three million, forty-three thousand, four hundred two".