402000310123 has 4 divisors (see below), whose sum is σ = 402312181320. Its totient is φ = 401688438928.

The previous prime is 402000310091. The next prime is 402000310141. The reversal of 402000310123 is 321013000204.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 402000310123 - 2⁵ = 402000310091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402000310097 and 402000310106.

It is not an unprimeable number, because it can be changed into a prime (402000310823) 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, 155933665 + ... + 155936242.

It is an arithmetic number, because the mean of its divisors is an integer number (100578045330).

Almost surely, 2^402000310123 is an apocalyptic number.

402000310123 is a deficient number, since it is larger than the sum of its proper divisors (311871197).

402000310123 is a wasteful number, since it uses less digits than its factorization.

402000310123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311871196.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 402000310123 its reverse (321013000204), we get a palindrome (723013310327).

The spelling of 402000310123 in words is "four hundred two billion, three hundred ten thousand, one hundred twenty-three".