31320011211 has 4 divisors (see below), whose sum is σ = 41760014952. Its totient is φ = 20880007472.

The previous prime is 31320011207. The next prime is 31320011213. The reversal of 31320011211 is 11211002313.

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 31320011211 - 2² = 31320011207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31320011213) 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, 5220001866 + ... + 5220001871.

It is an arithmetic number, because the mean of its divisors is an integer number (10440003738).

Almost surely, 2^31320011211 is an apocalyptic number.

31320011211 is a deficient number, since it is larger than the sum of its proper divisors (10440003741).

31320011211 is a wasteful number, since it uses less digits than its factorization.

31320011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10440003740.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31320011211 its reverse (11211002313), we get a palindrome (42531013524).

The spelling of 31320011211 in words is "thirty-one billion, three hundred twenty million, eleven thousand, two hundred eleven".