1222312187 has 2 divisors, whose sum is σ = 1222312188. Its totient is φ = 1222312186.

The previous prime is 1222312183. The next prime is 1222312277. The reversal of 1222312187 is 7812132221.

It is a weak prime.

It is an emirp because it is prime and its reverse (7812132221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222312187 - 2² = 1222312183 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222312183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611156093 + 611156094.

It is an arithmetic number, because the mean of its divisors is an integer number (611156094).

Almost surely, 2^1222312187 is an apocalyptic number.

1222312187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222312187 is an equidigital number, since it uses as much as digits as its factorization.

1222312187 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 1222312187 is about 34961.5815860782. The cubic root of 1222312187 is about 1069.2043425471.

The spelling of 1222312187 in words is "one billion, two hundred twenty-two million, three hundred twelve thousand, one hundred eighty-seven".