1222944871 has 2 divisors, whose sum is σ = 1222944872. Its totient is φ = 1222944870.

The previous prime is 1222944869. The next prime is 1222944893. The reversal of 1222944871 is 1784492221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222944871 - 2¹ = 1222944869 is a prime.

Together with 1222944869, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222984871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611472435 + 611472436.

It is an arithmetic number, because the mean of its divisors is an integer number (611472436).

Almost surely, 2^1222944871 is an apocalyptic number.

1222944871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222944871 is an equidigital number, since it uses as much as digits as its factorization.

1222944871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 1222944871 is about 34970.6286903739. The cubic root of 1222944871 is about 1069.3887885516.

The spelling of 1222944871 in words is "one billion, two hundred twenty-two million, nine hundred forty-four thousand, eight hundred seventy-one".