1340822221 has 16 divisors (see below), whose sum is σ = 1424122560. Its totient is φ = 1260138880.

The previous prime is 1340822177. The next prime is 1340822239. The reversal of 1340822221 is 1222280431.

It is a cyclic number.

It is not a de Polignac number, because 1340822221 - 2⁹ = 1340821709 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 (1340822281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 668406 + ... + 670408.

It is an arithmetic number, because the mean of its divisors is an integer number (89007660).

Almost surely, 2^1340822221 is an apocalyptic number.

It is an amenable number.

1340822221 is a deficient number, since it is larger than the sum of its proper divisors (83300339).

1340822221 is a wasteful number, since it uses less digits than its factorization.

1340822221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2636.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 1340822221 is about 36617.2393962188. The cubic root of 1340822221 is about 1102.6992171577.

The spelling of 1340822221 in words is "one billion, three hundred forty million, eight hundred twenty-two thousand, two hundred twenty-one".