1211102221187 has 2 divisors, whose sum is σ = 1211102221188. Its totient is φ = 1211102221186.

The previous prime is 1211102221181. The next prime is 1211102221213. The reversal of 1211102221187 is 7811222011121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211102221187 - 2¹⁶ = 1211102155651 is a prime.

It is a super-3 number, since 3×1211102221187³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1211102221181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605551110593 + 605551110594.

It is an arithmetic number, because the mean of its divisors is an integer number (605551110594).

Almost surely, 2^{1211102221187} is an apocalyptic number.

1211102221187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211102221187 is an equidigital number, since it uses as much as digits as its factorization.

1211102221187 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 29.

The spelling of 1211102221187 in words is "one trillion, two hundred eleven billion, one hundred two million, two hundred twenty-one thousand, one hundred eighty-seven".