1390221211 has 4 divisors (see below), whose sum is σ = 1390311000. Its totient is φ = 1390131424.

The previous prime is 1390221191. The next prime is 1390221247. The reversal of 1390221211 is 1121220931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1390221211 - 2⁷ = 1390221083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390221311) 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, 15061 + ... + 54838.

It is an arithmetic number, because the mean of its divisors is an integer number (347577750).

Almost surely, 2^1390221211 is an apocalyptic number.

1390221211 is a deficient number, since it is larger than the sum of its proper divisors (89789).

1390221211 is an equidigital number, since it uses as much as digits as its factorization.

1390221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89788.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1390221211 is about 37285.6703171607. The cubic root of 1390221211 is about 1116.0782295829.

The spelling of 1390221211 in words is "one billion, three hundred ninety million, two hundred twenty-one thousand, two hundred eleven".