1222211129 has 2 divisors, whose sum is σ = 1222211130. Its totient is φ = 1222211128.

The previous prime is 1222211093. The next prime is 1222211143. The reversal of 1222211129 is 9211122221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1019205625 + 203005504 = 31925^2 + 14248^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222211129 - 2¹² = 1222207033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1222291129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611105564 + 611105565.

It is an arithmetic number, because the mean of its divisors is an integer number (611105565).

Almost surely, 2^1222211129 is an apocalyptic number.

It is an amenable number.

1222211129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222211129 is an equidigital number, since it uses as much as digits as its factorization.

1222211129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 23.

The square root of 1222211129 is about 34960.1362840593. The cubic root of 1222211129 is about 1069.1748752714.

The spelling of 1222211129 in words is "one billion, two hundred twenty-two million, two hundred eleven thousand, one hundred twenty-nine".