401642200123 has 2 divisors, whose sum is σ = 401642200124. Its totient is φ = 401642200122.

The previous prime is 401642200121. The next prime is 401642200129. The reversal of 401642200123 is 321002246104.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401642200123 - 2¹ = 401642200121 is a prime.

It is a super-2 number, since 2×401642200123² (a number of 24 digits) contains 22 as substring.

Together with 401642200121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (401642200121) 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, 200821100061 + 200821100062.

It is an arithmetic number, because the mean of its divisors is an integer number (200821100062).

Almost surely, 2^401642200123 is an apocalyptic number.

401642200123 is a deficient number, since it is larger than the sum of its proper divisors (1).

401642200123 is an equidigital number, since it uses as much as digits as its factorization.

401642200123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 401642200123 its reverse (321002246104), we get a palindrome (722644446227).

The spelling of 401642200123 in words is "four hundred one billion, six hundred forty-two million, two hundred thousand, one hundred twenty-three".