2221110221987 has 2 divisors, whose sum is σ = 2221110221988. Its totient is φ = 2221110221986.

The previous prime is 2221110221977. The next prime is 2221110222031. The reversal of 2221110221987 is 7891220111222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221110221987 - 2²⁸ = 2220841786531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2221110221987.

It is not a weakly prime, because it can be changed into another prime (2221110221977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110555110993 + 1110555110994.

It is an arithmetic number, because the mean of its divisors is an integer number (1110555110994).

Almost surely, 2^{2221110221987} is an apocalyptic number.

2221110221987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221110221987 is an equidigital number, since it uses as much as digits as its factorization.

2221110221987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 2221110221987 in words is "two trillion, two hundred twenty-one billion, one hundred ten million, two hundred twenty-one thousand, nine hundred eighty-seven".