2221129 has 2 divisors, whose sum is σ = 2221130. Its totient is φ = 2221128.

The previous prime is 2221127. The next prime is 2221159. The reversal of 2221129 is 9211222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1166400 + 1054729 = 1080^2 + 1027^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221129 - 2¹ = 2221127 is a prime.

Together with 2221127, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2221127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110564 + 1110565.

It is an arithmetic number, because the mean of its divisors is an integer number (1110565).

2^2221129 is an apocalyptic number.

It is an amenable number.

2221129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221129 is an equidigital number, since it uses as much as digits as its factorization.

2221129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

The square root of 2221129 is about 1490.3452620115. The cubic root of 2221129 is about 130.4741854274.

The spelling of 2221129 in words is "two million, two hundred twenty-one thousand, one hundred twenty-nine".