1223123311 has 8 divisors (see below), whose sum is σ = 1226666160. Its totient is φ = 1219587072.

The previous prime is 1223123303. The next prime is 1223123333. The reversal of 1223123311 is 1133213221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1223123311 - 2³ = 1223123303 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 (1223153311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 867375 + ... + 868783.

It is an arithmetic number, because the mean of its divisors is an integer number (153333270).

Almost surely, 2^1223123311 is an apocalyptic number.

1223123311 is a deficient number, since it is larger than the sum of its proper divisors (3542849).

1223123311 is a wasteful number, since it uses less digits than its factorization.

1223123311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305.

The product of its digits is 216, while the sum is 19.

The square root of 1223123311 is about 34973.1798811604. The cubic root of 1223123311 is about 1069.4407975614.

Adding to 1223123311 its reverse (1133213221), we get a palindrome (2356336532).

The spelling of 1223123311 in words is "one billion, two hundred twenty-three million, one hundred twenty-three thousand, three hundred eleven".