311121310223 has 8 divisors (see below), whose sum is σ = 314167613760. Its totient is φ = 308078497440.

The previous prime is 311121310211. The next prime is 311121310229. The reversal of 311121310223 is 322013121113.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 311121310223 - 2¹² = 311121306127 is a prime.

It is a super-3 number, since 3×311121310223³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311121310195 and 311121310204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311121310229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 693383 + ... + 1050248.

It is an arithmetic number, because the mean of its divisors is an integer number (39270951720).

Almost surely, 2^311121310223 is an apocalyptic number.

311121310223 is a deficient number, since it is larger than the sum of its proper divisors (3046303537).

311121310223 is a wasteful number, since it uses less digits than its factorization.

311121310223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745377.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 311121310223 its reverse (322013121113), we get a palindrome (633134431336).

The spelling of 311121310223 in words is "three hundred eleven billion, one hundred twenty-one million, three hundred ten thousand, two hundred twenty-three".