221112222109997 has 2 divisors, whose sum is σ = 221112222109998. Its totient is φ = 221112222109996.

The previous prime is 221112222109969. The next prime is 221112222110041. The reversal of 221112222109997 is 799901222211122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187250460234601 + 33861761875396 = 13683949^2 + 5819086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221112222109997 is a prime.

It is a super-2 number, since 2×221112222109997² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221112222109297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110556111054998 + 110556111054999.

It is an arithmetic number, because the mean of its divisors is an integer number (110556111054999).

Almost surely, 2^{221112222109997} is an apocalyptic number.

It is an amenable number.

221112222109997 is a deficient number, since it is larger than the sum of its proper divisors (1).

221112222109997 is an equidigital number, since it uses as much as digits as its factorization.

221112222109997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 50.

The spelling of 221112222109997 in words is "two hundred twenty-one trillion, one hundred twelve billion, two hundred twenty-two million, one hundred nine thousand, nine hundred ninety-seven".