400013452143121 has 8 divisors (see below), whose sum is σ = 402707295671400. Its totient is φ = 397319731141632.

The previous prime is 400013452143113. The next prime is 400013452143163. The reversal of 400013452143121 is 121341254310004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23685888244225 + 376327563898896 = 4866815^2 + 19399164^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 400013452143121 - 2³ = 400013452143113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400013452143821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24075600 + ... + 37143793.

It is an arithmetic number, because the mean of its divisors is an integer number (50338411958925).

Almost surely, 2^{400013452143121} is an apocalyptic number.

It is an amenable number.

400013452143121 is a deficient number, since it is larger than the sum of its proper divisors (2693843528279).

400013452143121 is a wasteful number, since it uses less digits than its factorization.

400013452143121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61263395.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 400013452143121 in words is "four hundred trillion, thirteen billion, four hundred fifty-two million, one hundred forty-three thousand, one hundred twenty-one".