123402402034013 has 4 divisors (see below), whose sum is σ = 123408021217308. Its totient is φ = 123396782850720.

The previous prime is 123402402033983. The next prime is 123402402034049. The reversal of 123402402034013 is 310430204204321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60374966837689 + 63027435196324 = 7770133^2 + 7938982^2 .

It is a cyclic number.

It is not a de Polignac number, because 123402402034013 - 2¹² = 123402402029917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123402402034063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2809558706 + ... + 2809602627.

It is an arithmetic number, because the mean of its divisors is an integer number (30852005304327).

Almost surely, 2^{123402402034013} is an apocalyptic number.

It is an amenable number.

123402402034013 is a deficient number, since it is larger than the sum of its proper divisors (5619183295).

123402402034013 is an equidigital number, since it uses as much as digits as its factorization.

123402402034013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5619183294.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 123402402034013 its reverse (310430204204321), we get a palindrome (433832606238334).

The spelling of 123402402034013 in words is "one hundred twenty-three trillion, four hundred two billion, four hundred two million, thirty-four thousand, thirteen".