12111331232220 has 96 divisors (see below), whose sum is σ = 37138560189696. Its totient is φ = 2924655820800.

The previous prime is 12111331232207. The next prime is 12111331232227. The reversal of 12111331232220 is 2223213311121.

It is a super-2 number, since 2×12111331232220² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111331232227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35531746 + ... + 35870985.

It is an arithmetic number, because the mean of its divisors is an integer number (386860001976).

Almost surely, 2^{12111331232220} is an apocalyptic number.

12111331232220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111331232220 is an abundant number, since it is smaller than the sum of its proper divisors (25027228957476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12111331232220 is a wasteful number, since it uses less digits than its factorization.

12111331232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71403011 (or 71403009 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 12111331232220 its reverse (2223213311121), we get a palindrome (14334544543341).

The spelling of 12111331232220 in words is "twelve trillion, one hundred eleven billion, three hundred thirty-one million, two hundred thirty-two thousand, two hundred twenty".