1222231811 has 2 divisors, whose sum is σ = 1222231812. Its totient is φ = 1222231810.

The previous prime is 1222231793. The next prime is 1222231849. The reversal of 1222231811 is 1181322221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222231811 - 2²² = 1218037507 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222237811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611115905 + 611115906.

It is an arithmetic number, because the mean of its divisors is an integer number (611115906).

Almost surely, 2^1222231811 is an apocalyptic number.

1222231811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222231811 is an equidigital number, since it uses as much as digits as its factorization.

1222231811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 23.

The square root of 1222231811 is about 34960.4320768494. The cubic root of 1222231811 is about 1069.1809060217.

The spelling of 1222231811 in words is "one billion, two hundred twenty-two million, two hundred thirty-one thousand, eight hundred eleven".