3111212011 has 4 divisors (see below), whose sum is σ = 3116255112. Its totient is φ = 3106168912.

The previous prime is 3111211997. The next prime is 3111212029. The reversal of 3111212011 is 1102121113.

It is a happy number.

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 3111212011 - 2¹¹ = 3111209963 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3111211982 and 3111212000.

It is not an unprimeable number, because it can be changed into a prime (3111212051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2520625 + ... + 2521858.

It is an arithmetic number, because the mean of its divisors is an integer number (779063778).

Almost surely, 2^3111212011 is an apocalyptic number.

3111212011 is a deficient number, since it is larger than the sum of its proper divisors (5043101).

3111212011 is an equidigital number, since it uses as much as digits as its factorization.

3111212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5043100.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 3111212011 is about 55778.2395831923. The cubic root of 3111212011 is about 1459.8554950180.

Adding to 3111212011 its reverse (1102121113), we get a palindrome (4213333124).

The spelling of 3111212011 in words is "three billion, one hundred eleven million, two hundred twelve thousand, eleven".