31100220211 has 16 divisors (see below), whose sum is σ = 32004403200. Its totient is φ = 30206711808.

The previous prime is 31100220181. The next prime is 31100220227. The reversal of 31100220211 is 11202200113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31100220211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31100220191 and 31100220200.

It is not an unprimeable number, because it can be changed into a prime (31100227211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5888670 + ... + 5893948.

It is an arithmetic number, because the mean of its divisors is an integer number (2000275200).

Almost surely, 2^31100220211 is an apocalyptic number.

31100220211 is a deficient number, since it is larger than the sum of its proper divisors (904182989).

31100220211 is a wasteful number, since it uses less digits than its factorization.

31100220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6258.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31100220211 its reverse (11202200113), we get a palindrome (42302420324).

The spelling of 31100220211 in words is "thirty-one billion, one hundred million, two hundred twenty thousand, two hundred eleven".