212322199987 has 2 divisors, whose sum is σ = 212322199988. Its totient is φ = 212322199986.

The previous prime is 212322199981. The next prime is 212322200011. The reversal of 212322199987 is 789991223212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212322199987 - 2³ = 212322199979 is a prime.

It is not a weakly prime, because it can be changed into another prime (212322199981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106161099993 + 106161099994.

It is an arithmetic number, because the mean of its divisors is an integer number (106161099994).

Almost surely, 2^212322199987 is an apocalyptic number.

212322199987 is a deficient number, since it is larger than the sum of its proper divisors (1).

212322199987 is an equidigital number, since it uses as much as digits as its factorization.

212322199987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 55.

The spelling of 212322199987 in words is "two hundred twelve billion, three hundred twenty-two million, one hundred ninety-nine thousand, nine hundred eighty-seven".