400120515201 has 16 divisors (see below), whose sum is σ = 582005571840. Its totient is φ = 242492242320.

The previous prime is 400120515167. The next prime is 400120515203. The reversal of 400120515201 is 102515021004.

It is not a de Polignac number, because 400120515201 - 2¹⁰ = 400120514177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400120515203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2043570 + ... + 2230788.

It is an arithmetic number, because the mean of its divisors is an integer number (36375348240).

Almost surely, 2^400120515201 is an apocalyptic number.

It is an amenable number.

400120515201 is a deficient number, since it is larger than the sum of its proper divisors (181885056639).

400120515201 is a wasteful number, since it uses less digits than its factorization.

400120515201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251996.

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 400120515201 its reverse (102515021004), we get a palindrome (502635536205).

The spelling of 400120515201 in words is "four hundred billion, one hundred twenty million, five hundred fifteen thousand, two hundred one".