311221112123 has 8 divisors (see below), whose sum is σ = 335950826400. Its totient is φ = 287424594688.

The previous prime is 311221112113. The next prime is 311221112161. The reversal of 311221112123 is 321211122113.

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 311221112123 - 2¹⁰ = 311221111099 is a prime.

It is a super-3 number, since 3×311221112123³ (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 = 311221112095 and 311221112104.

It is not an unprimeable number, because it can be changed into a prime (311221112113) 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, 233298518 + ... + 233299851.

It is an arithmetic number, because the mean of its divisors is an integer number (41993853300).

Almost surely, 2^311221112123 is an apocalyptic number.

311221112123 is a deficient number, since it is larger than the sum of its proper divisors (24729714277).

311221112123 is a wasteful number, since it uses less digits than its factorization.

311221112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466598421.

The product of its digits is 144, while the sum is 20.

Adding to 311221112123 its reverse (321211122113), we get a palindrome (632432234236).

The spelling of 311221112123 in words is "three hundred eleven billion, two hundred twenty-one million, one hundred twelve thousand, one hundred twenty-three".