11222221210987 has 2 divisors, whose sum is σ = 11222221210988. Its totient is φ = 11222221210986.

The previous prime is 11222221210957. The next prime is 11222221211053. The reversal of 11222221210987 is 78901212222211.

It is a weak prime.

It is an emirp because it is prime and its reverse (78901212222211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11222221210987 is a prime.

It is not a weakly prime, because it can be changed into another prime (11222221210957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5611110605493 + 5611110605494.

It is an arithmetic number, because the mean of its divisors is an integer number (5611110605494).

Almost surely, 2^{11222221210987} is an apocalyptic number.

11222221210987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11222221210987 is an equidigital number, since it uses as much as digits as its factorization.

11222221210987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 40.

The spelling of 11222221210987 in words is "eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred ten thousand, nine hundred eighty-seven".