2231331021187 has 2 divisors, whose sum is σ = 2231331021188. Its totient is φ = 2231331021186.

The previous prime is 2231331021173. The next prime is 2231331021191. The reversal of 2231331021187 is 7811201331322.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2231331021187 - 2¹¹ = 2231331019139 is a prime.

It is a super-3 number, since 3×2231331021187³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (2231331021137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115665510593 + 1115665510594.

It is an arithmetic number, because the mean of its divisors is an integer number (1115665510594).

Almost surely, 2^{2231331021187} is an apocalyptic number.

2231331021187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231331021187 is an equidigital number, since it uses as much as digits as its factorization.

2231331021187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 2231331021187 in words is "two trillion, two hundred thirty-one billion, three hundred thirty-one million, twenty-one thousand, one hundred eighty-seven".