1222123311 has 6 divisors (see below), whose sum is σ = 1765289240. Its totient is φ = 814748868.

The previous prime is 1222123303. The next prime is 1222123313. The reversal of 1222123311 is 1133212221.

1222123311 is a `hidden beast` number, since 122 + 212 + 331 + 1 = 666.

It is not a de Polignac number, because 1222123311 - 2³ = 1222123303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222123313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67895731 + ... + 67895748.

Almost surely, 2^1222123311 is an apocalyptic number.

1222123311 is a deficient number, since it is larger than the sum of its proper divisors (543165929).

1222123311 is a wasteful number, since it uses less digits than its factorization.

1222123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135791485 (or 135791482 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1222123311 is about 34958.8802881328. The cubic root of 1222123311 is about 1069.1492672986.

Adding to 1222123311 its reverse (1133212221), we get a palindrome (2355335532).

The spelling of 1222123311 in words is "one billion, two hundred twenty-two million, one hundred twenty-three thousand, three hundred eleven".