400253023121 has 8 divisors (see below), whose sum is σ = 457437651264. Its totient is φ = 343069801200.

The previous prime is 400253023117. The next prime is 400253023129. The reversal of 400253023121 is 121320352004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400253023121 - 2² = 400253023117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400253023129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352331 + ... + 961583.

It is an arithmetic number, because the mean of its divisors is an integer number (57179706408).

Almost surely, 2^400253023121 is an apocalyptic number.

It is an amenable number.

400253023121 is a deficient number, since it is larger than the sum of its proper divisors (57184628143).

400253023121 is an equidigital number, since it uses as much as digits as its factorization.

400253023121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703111.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 400253023121 its reverse (121320352004), we get a palindrome (521573375125).

The spelling of 400253023121 in words is "four hundred billion, two hundred fifty-three million, twenty-three thousand, one hundred twenty-one".