221122021011209 has 2 divisors, whose sum is σ = 221122021011210. Its totient is φ = 221122021011208.

The previous prime is 221122021011173. The next prime is 221122021011263. The reversal of 221122021011209 is 902110120221122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218896374751609 + 2225646259600 = 14795147^2 + 1491860^2 .

It is a cyclic number.

It is not a de Polignac number, because 221122021011209 - 2⁸ = 221122021010953 is a prime.

It is not a weakly prime, because it can be changed into another prime (221122021011109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110561010505604 + 110561010505605.

It is an arithmetic number, because the mean of its divisors is an integer number (110561010505605).

Almost surely, 2^{221122021011209} is an apocalyptic number.

It is an amenable number.

221122021011209 is a deficient number, since it is larger than the sum of its proper divisors (1).

221122021011209 is an equidigital number, since it uses as much as digits as its factorization.

221122021011209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 221122021011209 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, twenty-one million, eleven thousand, two hundred nine".