12021012021120 has 128 divisors (see below), whose sum is σ = 38382255354240. Its totient is φ = 3200141912064.

The previous prime is 12021012021103. The next prime is 12021012021121. The reversal of 12021012021120 is 2112021012021.

It is a tau number, because it is divible by the number of its divisors (128).

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 12021012021120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021012021121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4205962 + ... + 6460041.

It is an arithmetic number, because the mean of its divisors is an integer number (299861369955).

Almost surely, 2^{12021012021120} is an apocalyptic number.

12021012021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021012021120 is an abundant number, since it is smaller than the sum of its proper divisors (26361243333120).

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

12021012021120 is a wasteful number, since it uses less digits than its factorization.

12021012021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10666612 (or 10666600 counting only the distinct ones).

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

Adding to 12021012021120 its reverse (2112021012021), we get a palindrome (14133033033141).

The spelling of 12021012021120 in words is "twelve trillion, twenty-one billion, twelve million, twenty-one thousand, one hundred twenty".