12221110987 has 2 divisors, whose sum is σ = 12221110988. Its totient is φ = 12221110986.

The previous prime is 12221110963. The next prime is 12221111017. The reversal of 12221110987 is 78901112221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221110987 is a prime.

It is a super-2 number, since 2×12221110987² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12221110387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110555493 + 6110555494.

It is an arithmetic number, because the mean of its divisors is an integer number (6110555494).

Almost surely, 2^12221110987 is an apocalyptic number.

12221110987 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221110987 is an equidigital number, since it uses as much as digits as its factorization.

12221110987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 34.

The spelling of 12221110987 in words is "twelve billion, two hundred twenty-one million, one hundred ten thousand, nine hundred eighty-seven".