1222021239 has 4 divisors (see below), whose sum is σ = 1629361656. Its totient is φ = 814680824.

The previous prime is 1222021223. The next prime is 1222021249. The reversal of 1222021239 is 9321202221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1222021239 - 2⁴ = 1222021223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222021219) 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, 203670204 + ... + 203670209.

It is an arithmetic number, because the mean of its divisors is an integer number (407340414).

Almost surely, 2^1222021239 is an apocalyptic number.

1222021239 is a deficient number, since it is larger than the sum of its proper divisors (407340417).

1222021239 is an equidigital number, since it uses as much as digits as its factorization.

1222021239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407340416.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1222021239 is about 34957.4203710743. The cubic root of 1222021239 is about 1069.1195012782.

The spelling of 1222021239 in words is "one billion, two hundred twenty-two million, twenty-one thousand, two hundred thirty-nine".