400231413121 has 4 divisors (see below), whose sum is σ = 400237830100. Its totient is φ = 400224996144.

The previous prime is 400231413089. The next prime is 400231413133. The reversal of 400231413121 is 121314132004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 142460953600 + 257770459521 = 377440^2 + 507711^2 .

It is a cyclic number.

It is not a de Polignac number, because 400231413121 - 2⁵ = 400231413089 is a prime.

It is a super-3 number, since 3×400231413121³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400231413092 and 400231413101.

It is not an unprimeable number, because it can be changed into a prime (400231413191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3114006 + ... + 3239983.

It is an arithmetic number, because the mean of its divisors is an integer number (100059457525).

Almost surely, 2^400231413121 is an apocalyptic number.

It is an amenable number.

400231413121 is a deficient number, since it is larger than the sum of its proper divisors (6416979).

400231413121 is an equidigital number, since it uses as much as digits as its factorization.

400231413121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6416978.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 400231413121 its reverse (121314132004), we get a palindrome (521545545125).

The spelling of 400231413121 in words is "four hundred billion, two hundred thirty-one million, four hundred thirteen thousand, one hundred twenty-one".