311212111102 has 4 divisors (see below), whose sum is σ = 466818166656. Its totient is φ = 155606055550.

The previous prime is 311212111099. The next prime is 311212111123. The reversal of 311212111102 is 201111212113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201111212113 = 7 ⋅28730173159.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77803027774 + ... + 77803027777.

It is an arithmetic number, because the mean of its divisors is an integer number (116704541664).

Almost surely, 2^311212111102 is an apocalyptic number.

311212111102 is a deficient number, since it is larger than the sum of its proper divisors (155606055554).

311212111102 is a wasteful number, since it uses less digits than its factorization.

311212111102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155606055553.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 311212111102 its reverse (201111212113), we get a palindrome (512323323215).

The spelling of 311212111102 in words is "three hundred eleven billion, two hundred twelve million, one hundred eleven thousand, one hundred two".