400302252123 has 4 divisors (see below), whose sum is σ = 533736336168. Its totient is φ = 266868168080.

The previous prime is 400302252073. The next prime is 400302252127. The reversal of 400302252123 is 321252203004.

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 400302252123 - 2²⁵ = 400268697691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400302252093 and 400302252102.

It is not an unprimeable number, because it can be changed into a prime (400302252127) 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 3 ways as a sum of consecutive naturals, for example, 66717042018 + ... + 66717042023.

It is an arithmetic number, because the mean of its divisors is an integer number (133434084042).

Almost surely, 2^400302252123 is an apocalyptic number.

400302252123 is a deficient number, since it is larger than the sum of its proper divisors (133434084045).

400302252123 is a wasteful number, since it uses less digits than its factorization.

400302252123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133434084044.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 400302252123 its reverse (321252203004), we get a palindrome (721554455127).

The spelling of 400302252123 in words is "four hundred billion, three hundred two million, two hundred fifty-two thousand, one hundred twenty-three".