401023511121 has 4 divisors (see below), whose sum is σ = 534698014832. Its totient is φ = 267349007412.

The previous prime is 401023511099. The next prime is 401023511123. The reversal of 401023511121 is 121115320104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 401023511121 - 2²⁷ = 400889293393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401023511123) 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, 66837251851 + ... + 66837251856.

It is an arithmetic number, because the mean of its divisors is an integer number (133674503708).

Almost surely, 2^401023511121 is an apocalyptic number.

It is an amenable number.

401023511121 is a deficient number, since it is larger than the sum of its proper divisors (133674503711).

401023511121 is a wasteful number, since it uses less digits than its factorization.

401023511121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133674503710.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 401023511121 its reverse (121115320104), we get a palindrome (522138831225).

The spelling of 401023511121 in words is "four hundred one billion, twenty-three million, five hundred eleven thousand, one hundred twenty-one".