12001021002120 has 128 divisors (see below), whose sum is σ = 37246348298880. Its totient is φ = 3091303680000.

The previous prime is 12001021002109. The next prime is 12001021002121. The reversal of 12001021002120 is 2120012010021.

It is a super-3 number, since 3×12001021002120³ (a number of 40 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12001021002096 and 12001021002105.

It is not an unprimeable number, because it can be changed into a prime (12001021002121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11578486 + ... + 12572325.

It is an arithmetic number, because the mean of its divisors is an integer number (290987096085).

Almost surely, 2^{12001021002120} is an apocalyptic number.

12001021002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001021002120 is an abundant number, since it is smaller than the sum of its proper divisors (25245327296760).

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

12001021002120 is a wasteful number, since it uses less digits than its factorization.

12001021002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24150967 (or 24150963 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12001021002120 its reverse (2120012010021), we get a palindrome (14121033012141).

The spelling of 12001021002120 in words is "twelve trillion, one billion, twenty-one million, two thousand, one hundred twenty".