311212111103 has 4 divisors (see below), whose sum is σ = 321943563240. Its totient is φ = 300480658968.

The previous prime is 311212111099. The next prime is 311212111123. The reversal of 311212111103 is 301111212113.

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

It is a cyclic number.

It is not a de Polignac number, because 311212111103 - 2² = 311212111099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311212111123) 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, 5365726025 + ... + 5365726082.

It is an arithmetic number, because the mean of its divisors is an integer number (80485890810).

Almost surely, 2^311212111103 is an apocalyptic number.

311212111103 is a deficient number, since it is larger than the sum of its proper divisors (10731452137).

311212111103 is a wasteful number, since it uses less digits than its factorization.

311212111103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10731452136.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 311212111103 its reverse (301111212113), we get a palindrome (612323323216).

The spelling of 311212111103 in words is "three hundred eleven billion, two hundred twelve million, one hundred eleven thousand, one hundred three".