221056371187 has 2 divisors, whose sum is σ = 221056371188. Its totient is φ = 221056371186.

The previous prime is 221056371149. The next prime is 221056371241. The reversal of 221056371187 is 781173650122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221056371187 - 2²³ = 221047982579 is a prime.

It is not a weakly prime, because it can be changed into another prime (221056381187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110528185593 + 110528185594.

It is an arithmetic number, because the mean of its divisors is an integer number (110528185594).

Almost surely, 2^221056371187 is an apocalyptic number.

221056371187 is a deficient number, since it is larger than the sum of its proper divisors (1).

221056371187 is an equidigital number, since it uses as much as digits as its factorization.

221056371187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 221056371187 in words is "two hundred twenty-one billion, fifty-six million, three hundred seventy-one thousand, one hundred eighty-seven".