1140404430421 has 4 divisors (see below), whose sum is σ = 1177191670144. Its totient is φ = 1103617190700.

The previous prime is 1140404430313. The next prime is 1140404430439. The reversal of 1140404430421 is 1240344040411.

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 a cyclic number.

It is not a de Polignac number, because 1140404430421 - 2⁷ = 1140404430293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1140404430421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140404430461) 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, 18393619815 + ... + 18393619876.

It is an arithmetic number, because the mean of its divisors is an integer number (294297917536).

Almost surely, 2^{1140404430421} is an apocalyptic number.

It is an amenable number.

1140404430421 is a deficient number, since it is larger than the sum of its proper divisors (36787239723).

1140404430421 is an equidigital number, since it uses as much as digits as its factorization.

1140404430421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36787239722.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 1140404430421 its reverse (1240344040411), we get a palindrome (2380748470832).

The spelling of 1140404430421 in words is "one trillion, one hundred forty billion, four hundred four million, four hundred thirty thousand, four hundred twenty-one".