11212199987 has 2 divisors, whose sum is σ = 11212199988. Its totient is φ = 11212199986.

The previous prime is 11212199983. The next prime is 11212200007. The reversal of 11212199987 is 78999121211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11212199987 - 2² = 11212199983 is a prime.

It is not a weakly prime, because it can be changed into another prime (11212199983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606099993 + 5606099994.

It is an arithmetic number, because the mean of its divisors is an integer number (5606099994).

Almost surely, 2^11212199987 is an apocalyptic number.

11212199987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212199987 is an equidigital number, since it uses as much as digits as its factorization.

11212199987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 50.

The spelling of 11212199987 in words is "eleven billion, two hundred twelve million, one hundred ninety-nine thousand, nine hundred eighty-seven".