311012221113 has 12 divisors (see below), whose sum is σ = 490079863728. Its totient is φ = 188492255160.

The previous prime is 311012221099. The next prime is 311012221127. The reversal of 311012221113 is 311122210113.

It is an interprime number because it is at equal distance from previous prime (311012221099) and next prime (311012221127).

It is not a de Polignac number, because 311012221113 - 2⁴ = 311012221097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (311012221153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1570768695 + ... + 1570768892.

It is an arithmetic number, because the mean of its divisors is an integer number (40839988644).

Almost surely, 2^311012221113 is an apocalyptic number.

311012221113 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

311012221113 is a deficient number, since it is larger than the sum of its proper divisors (179067642615).

311012221113 is a wasteful number, since it uses less digits than its factorization.

311012221113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141537604 (or 3141537601 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 311012221113 its reverse (311122210113), we get a palindrome (622134431226).

The spelling of 311012221113 in words is "three hundred eleven billion, twelve million, two hundred twenty-one thousand, one hundred thirteen".