31111211011 has 16 divisors (see below), whose sum is σ = 31860347904. Its totient is φ = 30371720544.

The previous prime is 31111211003. The next prime is 31111211039. The reversal of 31111211011 is 11011211113.

It is a cyclic number.

It is not a de Polignac number, because 31111211011 - 2³ = 31111211003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31111210982 and 31111211000.

It is not an unprimeable number, because it can be changed into a prime (31111211051) 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 15 ways as a sum of consecutive naturals, for example, 3387021 + ... + 3396193.

It is an arithmetic number, because the mean of its divisors is an integer number (1991271744).

Almost surely, 2^31111211011 is an apocalyptic number.

31111211011 is a deficient number, since it is larger than the sum of its proper divisors (749136893).

31111211011 is a wasteful number, since it uses less digits than its factorization.

31111211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9690.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 31111211011 its reverse (11011211113), we get a palindrome (42122422124).

The spelling of 31111211011 in words is "thirty-one billion, one hundred eleven million, two hundred eleven thousand, eleven".