1223402311 has 4 divisors (see below), whose sum is σ = 1223506912. Its totient is φ = 1223297712.

The previous prime is 1223402291. The next prime is 1223402329. The reversal of 1223402311 is 1132043221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1132043221 = 223 ⋅5076427.

It is a cyclic number.

It is not a de Polignac number, because 1223402311 - 2²³ = 1215013703 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 (1223402351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32175 + ... + 59008.

It is an arithmetic number, because the mean of its divisors is an integer number (305876728).

Almost surely, 2^1223402311 is an apocalyptic number.

1223402311 is a deficient number, since it is larger than the sum of its proper divisors (104601).

1223402311 is an equidigital number, since it uses as much as digits as its factorization.

1223402311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104600.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1223402311 is about 34977.1684245595. The cubic root of 1223402311 is about 1069.5221061523.

Adding to 1223402311 its reverse (1132043221), we get a palindrome (2355445532).

The spelling of 1223402311 in words is "one billion, two hundred twenty-three million, four hundred two thousand, three hundred eleven".