213122231197 has 2 divisors, whose sum is σ = 213122231198. Its totient is φ = 213122231196.

The previous prime is 213122231183. The next prime is 213122231219. The reversal of 213122231197 is 791132221312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139088718916 + 74033512281 = 372946^2 + 272091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213122231197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213122231107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106561115598 + 106561115599.

It is an arithmetic number, because the mean of its divisors is an integer number (106561115599).

Almost surely, 2^213122231197 is an apocalyptic number.

It is an amenable number.

213122231197 is a deficient number, since it is larger than the sum of its proper divisors (1).

213122231197 is an equidigital number, since it uses as much as digits as its factorization.

213122231197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The spelling of 213122231197 in words is "two hundred thirteen billion, one hundred twenty-two million, two hundred thirty-one thousand, one hundred ninety-seven".