402321042123 has 128 divisors (see below), whose sum is σ = 763572977664. Its totient is φ = 181650470400.

The previous prime is 402321042119. The next prime is 402321042139. The reversal of 402321042123 is 321240123204.

It is a happy number.

It is not a de Polignac number, because 402321042123 - 2² = 402321042119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402321042093 and 402321042102.

It is not an unprimeable number, because it can be changed into a prime (402321042103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3386040 + ... + 3502842.

It is an arithmetic number, because the mean of its divisors is an integer number (5965413888).

Almost surely, 2^402321042123 is an apocalyptic number.

402321042123 is a deficient number, since it is larger than the sum of its proper divisors (361251935541).

402321042123 is a wasteful number, since it uses less digits than its factorization.

402321042123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116905.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 402321042123 its reverse (321240123204), we get a palindrome (723561165327).

The spelling of 402321042123 in words is "four hundred two billion, three hundred twenty-one million, forty-two thousand, one hundred twenty-three".