12011021121120 has 192 divisors, whose sum is σ = 43247129458176. Its totient is φ = 2744903024640.

The previous prime is 12011021121083. The next prime is 12011021121139. The reversal of 12011021121120 is 2112112011021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12011021121120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19374355 + ... + 19984685.

It is an arithmetic number, because the mean of its divisors is an integer number (225245465928).

Almost surely, 2^{12011021121120} is an apocalyptic number.

12011021121120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12011021121120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21623564729088).

12011021121120 is an abundant number, since it is smaller than the sum of its proper divisors (31236108337056).

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

12011021121120 is a wasteful number, since it uses less digits than its factorization.

12011021121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616213 (or 616205 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12011021121120 its reverse (2112112011021), we get a palindrome (14123133132141).

The spelling of 12011021121120 in words is "twelve trillion, eleven billion, twenty-one million, one hundred twenty-one thousand, one hundred twenty".