11312221011 has 96 divisors (see below), whose sum is σ = 19301188608. Its totient is φ = 5766059520.

The previous prime is 11312220853. The next prime is 11312221051. The reversal of 11312221011 is 11012221311.

It is not a de Polignac number, because 11312221011 - 2⁹ = 11312220499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11312221051) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 36373546 + ... + 36373856.

It is an arithmetic number, because the mean of its divisors is an integer number (201054048).

Almost surely, 2^11312221011 is an apocalyptic number.

11312221011 is a deficient number, since it is larger than the sum of its proper divisors (7988967597).

11312221011 is a wasteful number, since it uses less digits than its factorization.

11312221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11312221011 its reverse (11012221311), we get a palindrome (22324442322).

The spelling of 11312221011 in words is "eleven billion, three hundred twelve million, two hundred twenty-one thousand, eleven".