222212201121997 has 2 divisors, whose sum is σ = 222212201121998. Its totient is φ = 222212201121996.

The previous prime is 222212201121943. The next prime is 222212201122099. The reversal of 222212201121997 is 799121102212222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159133835010276 + 63078366111721 = 12614826^2 + 7942189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222212201121997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222212201121697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111106100560998 + 111106100560999.

It is an arithmetic number, because the mean of its divisors is an integer number (111106100560999).

Almost surely, 2^{222212201121997} is an apocalyptic number.

It is an amenable number.

222212201121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

222212201121997 is an equidigital number, since it uses as much as digits as its factorization.

222212201121997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 222212201121997 in words is "two hundred twenty-two trillion, two hundred twelve billion, two hundred one million, one hundred twenty-one thousand, nine hundred ninety-seven".