212251447391 has 2 divisors, whose sum is σ = 212251447392. Its totient is φ = 212251447390.

The previous prime is 212251447357. The next prime is 212251447393. The reversal of 212251447391 is 193744152212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212251447391 - 2¹⁰ = 212251446367 is a prime.

Together with 212251447393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212251447393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106125723695 + 106125723696.

It is an arithmetic number, because the mean of its divisors is an integer number (106125723696).

Almost surely, 2^212251447391 is an apocalyptic number.

212251447391 is a deficient number, since it is larger than the sum of its proper divisors (1).

212251447391 is an equidigital number, since it uses as much as digits as its factorization.

212251447391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The spelling of 212251447391 in words is "two hundred twelve billion, two hundred fifty-one million, four hundred forty-seven thousand, three hundred ninety-one".