2231212187 has 2 divisors, whose sum is σ = 2231212188. Its totient is φ = 2231212186.

The previous prime is 2231212171. The next prime is 2231212211. The reversal of 2231212187 is 7812121322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2231212187 - 2⁴ = 2231212171 is a prime.

It is a super-3 number, since 3×2231212187³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2231212387) 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, 1115606093 + 1115606094.

It is an arithmetic number, because the mean of its divisors is an integer number (1115606094).

Almost surely, 2^2231212187 is an apocalyptic number.

2231212187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231212187 is an equidigital number, since it uses as much as digits as its factorization.

2231212187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 29.

The square root of 2231212187 is about 47235.7088122958. The cubic root of 2231212187 is about 1306.7132388374.

The spelling of 2231212187 in words is "two billion, two hundred thirty-one million, two hundred twelve thousand, one hundred eighty-seven".