31100212111 has 16 divisors (see below), whose sum is σ = 33000764800. Its totient is φ = 29226663648.

The previous prime is 31100212079. The next prime is 31100212139. The reversal of 31100212111 is 11121200113.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31100212111 - 2⁵ = 31100212079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31100212091 and 31100212100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31100212711) 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, 1838056 + ... + 1854898.

It is an arithmetic number, because the mean of its divisors is an integer number (2062547800).

Almost surely, 2^31100212111 is an apocalyptic number.

31100212111 is a deficient number, since it is larger than the sum of its proper divisors (1900552689).

31100212111 is a wasteful number, since it uses less digits than its factorization.

31100212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17638.

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

Adding to 31100212111 its reverse (11121200113), we get a palindrome (42221412224).

The spelling of 31100212111 in words is "thirty-one billion, one hundred million, two hundred twelve thousand, one hundred eleven".