1140400221 has 4 divisors (see below), whose sum is σ = 1520533632. Its totient is φ = 760266812.

The previous prime is 1140400207. The next prime is 1140400223. The reversal of 1140400221 is 1220040411.

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 1140400221 - 2⁵ = 1140400189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1140400221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140400223) 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, 190066701 + ... + 190066706.

It is an arithmetic number, because the mean of its divisors is an integer number (380133408).

Almost surely, 2^1140400221 is an apocalyptic number.

It is an amenable number.

1140400221 is a deficient number, since it is larger than the sum of its proper divisors (380133411).

1140400221 is an equidigital number, since it uses as much as digits as its factorization.

1140400221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380133410.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1140400221 is about 33769.8122736861. The cubic root of 1140400221 is about 1044.7661606002.

Adding to 1140400221 its reverse (1220040411), we get a palindrome (2360440632).

The spelling of 1140400221 in words is "one billion, one hundred forty million, four hundred thousand, two hundred twenty-one".