221000211001187 has 2 divisors, whose sum is σ = 221000211001188. Its totient is φ = 221000211001186.

The previous prime is 221000211001181. The next prime is 221000211001211. The reversal of 221000211001187 is 781100112000122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221000211001187 is a prime.

It is not a weakly prime, because it can be changed into another prime (221000211001181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500105500593 + 110500105500594.

It is an arithmetic number, because the mean of its divisors is an integer number (110500105500594).

Almost surely, 2^{221000211001187} is an apocalyptic number.

221000211001187 is a deficient number, since it is larger than the sum of its proper divisors (1).

221000211001187 is an equidigital number, since it uses as much as digits as its factorization.

221000211001187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 26.

The spelling of 221000211001187 in words is "two hundred twenty-one trillion, two hundred eleven million, one thousand, one hundred eighty-seven".