10221209987 has 2 divisors, whose sum is σ = 10221209988. Its totient is φ = 10221209986.

The previous prime is 10221209969. The next prime is 10221210001. The reversal of 10221209987 is 78990212201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10221209987 - 2⁸ = 10221209731 is a prime.

It is not a weakly prime, because it can be changed into another prime (10221209917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110604993 + 5110604994.

It is an arithmetic number, because the mean of its divisors is an integer number (5110604994).

Almost surely, 2^10221209987 is an apocalyptic number.

10221209987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221209987 is an equidigital number, since it uses as much as digits as its factorization.

10221209987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 41.

The spelling of 10221209987 in words is "ten billion, two hundred twenty-one million, two hundred nine thousand, nine hundred eighty-seven".