212222200391 has 2 divisors, whose sum is σ = 212222200392. Its totient is φ = 212222200390.

The previous prime is 212222200319. The next prime is 212222200403. The reversal of 212222200391 is 193002222212.

Together with previous prime (212222200319) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212222200391 - 2¹⁰ = 212222199367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212222200391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212222200691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106111100195 + 106111100196.

It is an arithmetic number, because the mean of its divisors is an integer number (106111100196).

Almost surely, 2^212222200391 is an apocalyptic number.

212222200391 is a deficient number, since it is larger than the sum of its proper divisors (1).

212222200391 is an equidigital number, since it uses as much as digits as its factorization.

212222200391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 212222200391 in words is "two hundred twelve billion, two hundred twenty-two million, two hundred thousand, three hundred ninety-one".