311211320011 has 4 divisors (see below), whose sum is σ = 324742246992. Its totient is φ = 297680393032.

The previous prime is 311211319967. The next prime is 311211320039. The reversal of 311211320011 is 110023112113.

It is a happy number.

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

It is not a de Polignac number, because 311211320011 - 2¹⁹ = 311210795723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311211320051) 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, 6765463456 + ... + 6765463501.

It is an arithmetic number, because the mean of its divisors is an integer number (81185561748).

Almost surely, 2^311211320011 is an apocalyptic number.

311211320011 is a deficient number, since it is larger than the sum of its proper divisors (13530926981).

311211320011 is a wasteful number, since it uses less digits than its factorization.

311211320011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13530926980.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 311211320011 its reverse (110023112113), we get a palindrome (421234432124).

The spelling of 311211320011 in words is "three hundred eleven billion, two hundred eleven million, three hundred twenty thousand, eleven".