440121131 has 8 divisors (see below), whose sum is σ = 443930544. Its totient is φ = 436320640.

The previous prime is 440121053. The next prime is 440121133. The reversal of 440121131 is 131121044.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440121131 is a prime.

It is a super-2 number, since 2×440121131² = 387413219905438322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440121133) 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, 128876 + ... + 132246.

It is an arithmetic number, because the mean of its divisors is an integer number (55491318).

Almost surely, 2^440121131 is an apocalyptic number.

440121131 is a deficient number, since it is larger than the sum of its proper divisors (3809413).

440121131 is a wasteful number, since it uses less digits than its factorization.

440121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4461.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 440121131 is about 20979.0641116328. The cubic root of 440121131 is about 760.6602820263.

Adding to 440121131 its reverse (131121044), we get a palindrome (571242175).

The spelling of 440121131 in words is "four hundred forty million, one hundred twenty-one thousand, one hundred thirty-one".