213122420202397 has 2 divisors, whose sum is σ = 213122420202398. Its totient is φ = 213122420202396.

The previous prime is 213122420202371. The next prime is 213122420202407. The reversal of 213122420202397 is 793202024221312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197407586132761 + 15714834069636 = 14050181^2 + 3964194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213122420202397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213122420802397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106561210101198 + 106561210101199.

It is an arithmetic number, because the mean of its divisors is an integer number (106561210101199).

Almost surely, 2^{213122420202397} is an apocalyptic number.

It is an amenable number.

213122420202397 is a deficient number, since it is larger than the sum of its proper divisors (1).

213122420202397 is an equidigital number, since it uses as much as digits as its factorization.

213122420202397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 213122420202397 in words is "two hundred thirteen trillion, one hundred twenty-two billion, four hundred twenty million, two hundred two thousand, three hundred ninety-seven".