201222212197 has 2 divisors, whose sum is σ = 201222212198. Its totient is φ = 201222212196.

The previous prime is 201222212173. The next prime is 201222212201. The reversal of 201222212197 is 791212222102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200631430561 + 590781636 = 447919^2 + 24306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201222212197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201222612197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100611106098 + 100611106099.

It is an arithmetic number, because the mean of its divisors is an integer number (100611106099).

Almost surely, 2^201222212197 is an apocalyptic number.

It is an amenable number.

201222212197 is a deficient number, since it is larger than the sum of its proper divisors (1).

201222212197 is an equidigital number, since it uses as much as digits as its factorization.

201222212197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

Adding to 201222212197 its reverse (791212222102), we get a palindrome (992434434299).

The spelling of 201222212197 in words is "two hundred one billion, two hundred twenty-two million, two hundred twelve thousand, one hundred ninety-seven".