212211433397 has 2 divisors, whose sum is σ = 212211433398. Its totient is φ = 212211433396.

The previous prime is 212211433391. The next prime is 212211433457. The reversal of 212211433397 is 793334112212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151518676516 + 60692756881 = 389254^2 + 246359^2 .

It is a cyclic number.

It is not a de Polignac number, because 212211433397 - 2²² = 212207239093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212211433397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212211433391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105716698 + 106105716699.

It is an arithmetic number, because the mean of its divisors is an integer number (106105716699).

Almost surely, 2^212211433397 is an apocalyptic number.

It is an amenable number.

212211433397 is a deficient number, since it is larger than the sum of its proper divisors (1).

212211433397 is an equidigital number, since it uses as much as digits as its factorization.

212211433397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The spelling of 212211433397 in words is "two hundred twelve billion, two hundred eleven million, four hundred thirty-three thousand, three hundred ninety-seven".