31122100011 has 4 divisors (see below), whose sum is σ = 41496133352. Its totient is φ = 20748066672.

The previous prime is 31122099961. The next prime is 31122100049. The reversal of 31122100011 is 11000122113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11000122113 = 3 ⋅3666707371.

It is a de Polignac number, because none of the positive numbers 2^k-31122100011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31122100011.

It is not an unprimeable number, because it can be changed into a prime (31122100091) 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, 5187016666 + ... + 5187016671.

It is an arithmetic number, because the mean of its divisors is an integer number (10374033338).

Almost surely, 2^31122100011 is an apocalyptic number.

31122100011 is a deficient number, since it is larger than the sum of its proper divisors (10374033341).

31122100011 is a wasteful number, since it uses less digits than its factorization.

31122100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10374033340.

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

Adding to 31122100011 its reverse (11000122113), we get a palindrome (42122222124).

The spelling of 31122100011 in words is "thirty-one billion, one hundred twenty-two million, one hundred thousand, eleven".