400121130445 has 16 divisors (see below), whose sum is σ = 508447903680. Its totient is φ = 301232888064.

The previous prime is 400121130391. The next prime is 400121130463. The reversal of 400121130445 is 544031121004.

It is a cyclic number.

It is not a de Polignac number, because 400121130445 - 2²³ = 400112741837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480886 + ... + 1015624.

It is an arithmetic number, because the mean of its divisors is an integer number (31777993980).

Almost surely, 2^400121130445 is an apocalyptic number.

It is an amenable number.

400121130445 is a deficient number, since it is larger than the sum of its proper divisors (108326773235).

400121130445 is a wasteful number, since it uses less digits than its factorization.

400121130445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543564.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 400121130445 its reverse (544031121004), we get a palindrome (944152251449).

The spelling of 400121130445 in words is "four hundred billion, one hundred twenty-one million, one hundred thirty thousand, four hundred forty-five".