311104021 has 4 divisors (see below), whose sum is σ = 311171392. Its totient is φ = 311036652.

The previous prime is 311104019. The next prime is 311104033. The reversal of 311104021 is 120401113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 311104021 - 2¹ = 311104019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311103992 and 311104010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311104051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26205 + ... + 36178.

It is an arithmetic number, because the mean of its divisors is an integer number (77792848).

Almost surely, 2^311104021 is an apocalyptic number.

It is an amenable number.

311104021 is a deficient number, since it is larger than the sum of its proper divisors (67371).

311104021 is an equidigital number, since it uses as much as digits as its factorization.

311104021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67370.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 311104021 is about 17638.1410868606. The cubic root of 311104021 is about 677.5924237686.

Adding to 311104021 its reverse (120401113), we get a palindrome (431505134).

The spelling of 311104021 in words is "three hundred eleven million, one hundred four thousand, twenty-one".