1222195771 has 2 divisors, whose sum is σ = 1222195772. Its totient is φ = 1222195770.

The previous prime is 1222195703. The next prime is 1222195811. The reversal of 1222195771 is 1775912221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1222195771 - 2¹⁹ = 1221671483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222195771.

It is not a weakly prime, because it can be changed into another prime (1222192771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611097885 + 611097886.

It is an arithmetic number, because the mean of its divisors is an integer number (611097886).

Almost surely, 2^1222195771 is an apocalyptic number.

1222195771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222195771 is an equidigital number, since it uses as much as digits as its factorization.

1222195771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 37.

The square root of 1222195771 is about 34959.9166331958. The cubic root of 1222195771 is about 1069.1703969245.

The spelling of 1222195771 in words is "one billion, two hundred twenty-two million, one hundred ninety-five thousand, seven hundred seventy-one".