401220023 has 2 divisors, whose sum is σ = 401220024. Its totient is φ = 401220022.

The previous prime is 401220007. The next prime is 401220031. The reversal of 401220023 is 320022104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401220023 - 2⁴ = 401220007 is a prime.

It is a super-2 number, since 2×401220023² = 321955013712241058, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401220923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200610011 + 200610012.

It is an arithmetic number, because the mean of its divisors is an integer number (200610012).

Almost surely, 2^401220023 is an apocalyptic number.

401220023 is a deficient number, since it is larger than the sum of its proper divisors (1).

401220023 is an equidigital number, since it uses as much as digits as its factorization.

401220023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 401220023 is about 20030.4773532734. The cubic root of 401220023 is about 737.5546399429.

Adding to 401220023 its reverse (320022104), we get a palindrome (721242127).

The spelling of 401220023 in words is "four hundred one million, two hundred twenty thousand, twenty-three".