212200021391 has 2 divisors, whose sum is σ = 212200021392. Its totient is φ = 212200021390.

The previous prime is 212200021379. The next prime is 212200021427. The reversal of 212200021391 is 193120002212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212200021391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212200021991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106100010695 + 106100010696.

It is an arithmetic number, because the mean of its divisors is an integer number (106100010696).

Almost surely, 2^212200021391 is an apocalyptic number.

212200021391 is a deficient number, since it is larger than the sum of its proper divisors (1).

212200021391 is an equidigital number, since it uses as much as digits as its factorization.

212200021391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 212200021391 in words is "two hundred twelve billion, two hundred million, twenty-one thousand, three hundred ninety-one".