221102121187 has 2 divisors, whose sum is σ = 221102121188. Its totient is φ = 221102121186.

The previous prime is 221102121181. The next prime is 221102121241. The reversal of 221102121187 is 781121201122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221102121187 - 2³ = 221102121179 is a prime.

It is a super-2 number, since 2×221102121187² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221102121181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110551060593 + 110551060594.

It is an arithmetic number, because the mean of its divisors is an integer number (110551060594).

Almost surely, 2^221102121187 is an apocalyptic number.

221102121187 is a deficient number, since it is larger than the sum of its proper divisors (1).

221102121187 is an equidigital number, since it uses as much as digits as its factorization.

221102121187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 28.

The spelling of 221102121187 in words is "two hundred twenty-one billion, one hundred two million, one hundred twenty-one thousand, one hundred eighty-seven".