212220199987 has 2 divisors, whose sum is σ = 212220199988. Its totient is φ = 212220199986.

The previous prime is 212220199979. The next prime is 212220200011. The reversal of 212220199987 is 789991022212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212220199987 - 2³ = 212220199979 is a prime.

It is not a weakly prime, because it can be changed into another prime (212220199967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110099993 + 106110099994.

It is an arithmetic number, because the mean of its divisors is an integer number (106110099994).

Almost surely, 2^212220199987 is an apocalyptic number.

212220199987 is a deficient number, since it is larger than the sum of its proper divisors (1).

212220199987 is an equidigital number, since it uses as much as digits as its factorization.

212220199987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 52.

The spelling of 212220199987 in words is "two hundred twelve billion, two hundred twenty million, one hundred ninety-nine thousand, nine hundred eighty-seven".