12210219997 has 2 divisors, whose sum is σ = 12210219998. Its totient is φ = 12210219996.

The previous prime is 12210219949. The next prime is 12210220019. The reversal of 12210219997 is 79991201221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6503777316 + 5706442681 = 80646^2 + 75541^2 .

It is a cyclic number.

It is not a de Polignac number, because 12210219997 - 2³¹ = 10062736349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12210219937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105109998 + 6105109999.

It is an arithmetic number, because the mean of its divisors is an integer number (6105109999).

Almost surely, 2^12210219997 is an apocalyptic number.

It is an amenable number.

12210219997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12210219997 is an equidigital number, since it uses as much as digits as its factorization.

12210219997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 43.

The spelling of 12210219997 in words is "twelve billion, two hundred ten million, two hundred nineteen thousand, nine hundred ninety-seven".