113144440421 has 4 divisors (see below), whose sum is σ = 113145144000. Its totient is φ = 113143736844.

The previous prime is 113144440411. The next prime is 113144440447. The reversal of 113144440421 is 124044441311.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 124044441311 = 7 ⋅17720634473.

It is a cyclic number.

It is not a de Polignac number, because 113144440421 - 2²² = 113140246117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113144440411) 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, 21380 + ... + 476178.

It is an arithmetic number, because the mean of its divisors is an integer number (28286286000).

Almost surely, 2^113144440421 is an apocalyptic number.

It is an amenable number.

113144440421 is a deficient number, since it is larger than the sum of its proper divisors (703579).

113144440421 is an equidigital number, since it uses as much as digits as its factorization.

113144440421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703578.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 113144440421 its reverse (124044441311), we get a palindrome (237188881732).

The spelling of 113144440421 in words is "one hundred thirteen billion, one hundred forty-four million, four hundred forty thousand, four hundred twenty-one".