1340224221 has 8 divisors (see below), whose sum is σ = 2042246464. Its totient is φ = 765842400.

The previous prime is 1340224219. The next prime is 1340224273. The reversal of 1340224221 is 1224220431.

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

It is not a de Polignac number, because 1340224221 - 2¹ = 1340224219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 63820201 = 1340224221 / (1 + 3 + 4 + 0 + 2 + 2 + 4 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340224021) 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, 31910080 + ... + 31910121.

It is an arithmetic number, because the mean of its divisors is an integer number (255280808).

Almost surely, 2^1340224221 is an apocalyptic number.

It is an amenable number.

1340224221 is a deficient number, since it is larger than the sum of its proper divisors (702022243).

1340224221 is an equidigital number, since it uses as much as digits as its factorization.

1340224221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63820211.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1340224221 is about 36609.0729328127. The cubic root of 1340224221 is about 1102.5352600032.

Adding to 1340224221 its reverse (1224220431), we get a palindrome (2564444652).

The spelling of 1340224221 in words is "one billion, three hundred forty million, two hundred twenty-four thousand, two hundred twenty-one".