11223131987 has 2 divisors, whose sum is σ = 11223131988. Its totient is φ = 11223131986.

The previous prime is 11223131873. The next prime is 11223132001. The reversal of 11223131987 is 78913132211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11223131987 - 2¹² = 11223127891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11223131987.

It is not a weakly prime, because it can be changed into another prime (11223101987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5611565993 + 5611565994.

It is an arithmetic number, because the mean of its divisors is an integer number (5611565994).

Almost surely, 2^11223131987 is an apocalyptic number.

11223131987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11223131987 is an equidigital number, since it uses as much as digits as its factorization.

11223131987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The spelling of 11223131987 in words is "eleven billion, two hundred twenty-three million, one hundred thirty-one thousand, nine hundred eighty-seven".