12011031121220 has 12 divisors (see below), whose sum is σ = 25223165354604. Its totient is φ = 4804412448480.

The previous prime is 12011031121097. The next prime is 12011031121249. The reversal of 12011031121220 is 2212113011021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2612723097664 + 9398308023556 = 1616392^2 + 3065666^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300275778011 + ... + 300275778050.

It is an arithmetic number, because the mean of its divisors is an integer number (2101930446217).

Almost surely, 2^{12011031121220} is an apocalyptic number.

12011031121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011031121220 is an abundant number, since it is smaller than the sum of its proper divisors (13212134233384).

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

12011031121220 is a wasteful number, since it uses less digits than its factorization.

12011031121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600551556070 (or 600551556068 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 12011031121220 its reverse (2212113011021), we get a palindrome (14223144132241).

The spelling of 12011031121220 in words is "twelve trillion, eleven billion, thirty-one million, one hundred twenty-one thousand, two hundred twenty".