401023511123 has 2 divisors, whose sum is σ = 401023511124. Its totient is φ = 401023511122.

The previous prime is 401023511099. The next prime is 401023511131. The reversal of 401023511123 is 321115320104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401023511123 - 2²⁸ = 400755075667 is a prime.

It is a super-2 number, since 2×401023511123² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (401023511023) 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 as a sum of consecutive naturals, namely, 200511755561 + 200511755562.

It is an arithmetic number, because the mean of its divisors is an integer number (200511755562).

Almost surely, 2^401023511123 is an apocalyptic number.

401023511123 is a deficient number, since it is larger than the sum of its proper divisors (1).

401023511123 is an equidigital number, since it uses as much as digits as its factorization.

401023511123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 401023511123 its reverse (321115320104), we get a palindrome (722138831227).

The spelling of 401023511123 in words is "four hundred one billion, twenty-three million, five hundred eleven thousand, one hundred twenty-three".