1221122239 has 2 divisors, whose sum is σ = 1221122240. Its totient is φ = 1221122238.

The previous prime is 1221122207. The next prime is 1221122281. The reversal of 1221122239 is 9322211221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221122239 - 2⁵ = 1221122207 is a prime.

It is a super-2 number, since 2×1221122239² = 2982279045160746242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221128239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610561119 + 610561120.

It is an arithmetic number, because the mean of its divisors is an integer number (610561120).

Almost surely, 2^1221122239 is an apocalyptic number.

1221122239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221122239 is an equidigital number, since it uses as much as digits as its factorization.

1221122239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 1221122239 is about 34944.5595050217. The cubic root of 1221122239 is about 1068.8572651867.

The spelling of 1221122239 in words is "one billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred thirty-nine".