12020121121020 has 48 divisors (see below), whose sum is σ = 33657384539520. Its totient is φ = 3205266070336.

The previous prime is 12020121121007. The next prime is 12020121121069. The reversal of 12020121121020 is 2012112102021.

It is a super-2 number, since 2×12020121121020² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

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, 1153350 + ... + 5036909.

It is an arithmetic number, because the mean of its divisors is an integer number (701195511240).

Almost surely, 2^{12020121121020} is an apocalyptic number.

12020121121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12020121121020 is an abundant number, since it is smaller than the sum of its proper divisors (21637263418500).

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

12020121121020 is a wasteful number, since it uses less digits than its factorization.

12020121121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6222634 (or 6222632 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12020121121020 its reverse (2012112102021), we get a palindrome (14032233223041).

The spelling of 12020121121020 in words is "twelve trillion, twenty billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty".