311111121111203 has 8 divisors (see below), whose sum is σ = 355600420783872. Its totient is φ = 266633034888456.

The previous prime is 311111121111199. The next prime is 311111121111233. The reversal of 311111121111203 is 302111121111113.

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 311111121111203 - 2² = 311111121111199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311111121111233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2803303025 + ... + 2803414002.

It is an arithmetic number, because the mean of its divisors is an integer number (44450052597984).

Almost surely, 2^{311111121111203} is an apocalyptic number.

311111121111203 is a deficient number, since it is larger than the sum of its proper divisors (44489299672669).

311111121111203 is an equidigital number, since it uses as much as digits as its factorization.

311111121111203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5606724961.

The product of its (nonzero) digits is 36, while the sum is 20.

Adding to 311111121111203 its reverse (302111121111113), we get a palindrome (613222242222316).

The spelling of 311111121111203 in words is "three hundred eleven trillion, one hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, two hundred three".