222221221109 has 2 divisors, whose sum is σ = 222221221110. Its totient is φ = 222221221108.

The previous prime is 222221221051. The next prime is 222221221139. The reversal of 222221221109 is 901122122222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115857182884 + 106364038225 = 340378^2 + 326135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222221221109 is a prime.

It is a super-2 number, since 2×222221221109² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222221221139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110610554 + 111110610555.

It is an arithmetic number, because the mean of its divisors is an integer number (111110610555).

Almost surely, 2^222221221109 is an apocalyptic number.

It is an amenable number.

222221221109 is a deficient number, since it is larger than the sum of its proper divisors (1).

222221221109 is an equidigital number, since it uses as much as digits as its factorization.

222221221109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 222221221109 in words is "two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred nine".