12011121320 has 64 divisors (see below), whose sum is σ = 31033540800. Its totient is φ = 4137799680.

The previous prime is 12011121307. The next prime is 12011121347. The reversal of 12011121320 is 2312111021.

It is a junction number, because it is equal to n+sod(n) for n = 12011121295 and 12011121304.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 710009 + ... + 726728.

It is an arithmetic number, because the mean of its divisors is an integer number (484899075).

Almost surely, 2^12011121320 is an apocalyptic number.

12011121320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011121320 is an abundant number, since it is smaller than the sum of its proper divisors (19022419480).

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

12011121320 is a wasteful number, since it uses less digits than its factorization.

12011121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436778 (or 1436774 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12011121320 its reverse (2312111021), we get a palindrome (14323232341).

It can be divided in two parts, 12011 and 121320, that added together give a palindrome (133331).

The spelling of 12011121320 in words is "twelve billion, eleven million, one hundred twenty-one thousand, three hundred twenty".