1311110020321 has 4 divisors (see below), whose sum is σ = 1311219556144. Its totient is φ = 1311000484500.

The previous prime is 1311110020307. The next prime is 1311110020333. The reversal of 1311110020321 is 1230200111131.

It is a happy number.

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 1311110020321 - 2²⁹ = 1310573149409 is a prime.

It is a super-2 number, since 2×1311110020321² (a number of 25 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 = 1311110020295 and 1311110020304.

It is not an unprimeable number, because it can be changed into a prime (1311110020361) 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, 54749955 + ... + 54773896.

It is an arithmetic number, because the mean of its divisors is an integer number (327804889036).

Almost surely, 2^{1311110020321} is an apocalyptic number.

It is an amenable number.

1311110020321 is a deficient number, since it is larger than the sum of its proper divisors (109535823).

1311110020321 is a wasteful number, since it uses less digits than its factorization.

1311110020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109535822.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1311110020321 its reverse (1230200111131), we get a palindrome (2541310131452).

The spelling of 1311110020321 in words is "one trillion, three hundred eleven billion, one hundred ten million, twenty thousand, three hundred twenty-one".