311003021113321 has 4 divisors (see below), whose sum is σ = 311003088079572. Its totient is φ = 311002954147072.

The previous prime is 311003021113307. The next prime is 311003021113333. The reversal of 311003021113321 is 123311120300113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 113166278065296 + 197836743048025 = 10637964^2 + 14065445^2 .

It is a cyclic number.

It is not a de Polignac number, because 311003021113321 - 2²⁷ = 311002886895593 is a prime.

It is a super-2 number, since 2×311003021113321² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311003021113292 and 311003021113301.

It is not an unprimeable number, because it can be changed into a prime (311003021113021) 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, 25952260 + ... + 35993413.

It is an arithmetic number, because the mean of its divisors is an integer number (77750772019893).

Almost surely, 2^{311003021113321} is an apocalyptic number.

It is an amenable number.

311003021113321 is a deficient number, since it is larger than the sum of its proper divisors (66966251).

311003021113321 is an equidigital number, since it uses as much as digits as its factorization.

311003021113321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66966250.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 311003021113321 its reverse (123311120300113), we get a palindrome (434314141413434).

The spelling of 311003021113321 in words is "three hundred eleven trillion, three billion, twenty-one million, one hundred thirteen thousand, three hundred twenty-one".