1204320311 has 4 divisors (see below), whose sum is σ = 1206372552. Its totient is φ = 1202268072.

The previous prime is 1204320259. The next prime is 1204320317. The reversal of 1204320311 is 1130234021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1130234021 = 7 ⋅161462003.

It is a cyclic number.

It is not a de Polignac number, because 1204320311 - 2¹⁴ = 1204303927 is a prime.

It is a super-2 number, since 2×1204320311² = 2900774822974273442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1204320311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204320317) 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, 1025240 + ... + 1026413.

It is an arithmetic number, because the mean of its divisors is an integer number (301593138).

Almost surely, 2^1204320311 is an apocalyptic number.

1204320311 is a deficient number, since it is larger than the sum of its proper divisors (2052241).

1204320311 is an equidigital number, since it uses as much as digits as its factorization.

1204320311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052240.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1204320311 is about 34703.3184436301. The cubic root of 1204320311 is about 1063.9323238726.

Adding to 1204320311 its reverse (1130234021), we get a palindrome (2334554332).

The spelling of 1204320311 in words is "one billion, two hundred four million, three hundred twenty thousand, three hundred eleven".