22001221129 has 2 divisors, whose sum is σ = 22001221130. Its totient is φ = 22001221128.

The previous prime is 22001221103. The next prime is 22001221153. The reversal of 22001221129 is 92112210022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12030799225 + 9970421904 = 109685^2 + 99852^2 .

It is a cyclic number.

It is not a de Polignac number, because 22001221129 - 2⁷ = 22001221001 is a prime.

It is not a weakly prime, because it can be changed into another prime (22001221199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000610564 + 11000610565.

It is an arithmetic number, because the mean of its divisors is an integer number (11000610565).

Almost surely, 2^22001221129 is an apocalyptic number.

It is an amenable number.

22001221129 is a deficient number, since it is larger than the sum of its proper divisors (1).

22001221129 is an equidigital number, since it uses as much as digits as its factorization.

22001221129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 22001221129 in words is "twenty-two billion, one million, two hundred twenty-one thousand, one hundred twenty-nine".