12021121002000 has 640 divisors, whose sum is σ = 42579842572800. Its totient is φ = 2893578240000.

The previous prime is 12021121001999. The next prime is 12021121002001. The reversal of 12021121002000 is 20012112021.

It is an interprime number because it is at equal distance from previous prime (12021121001999) and next prime (12021121002001).

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

It is not an unprimeable number, because it can be changed into a prime (12021121002001) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6904721130 + ... + 6904722870.

It is an arithmetic number, because the mean of its divisors is an integer number (66531004020).

Almost surely, 2^{12021121002000} is an apocalyptic number.

12021121002000 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 12021121002000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21289921286400).

12021121002000 is an abundant number, since it is smaller than the sum of its proper divisors (30558721570800).

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

12021121002000 is a wasteful number, since it uses less digits than its factorization.

12021121002000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460 (or 2444 counting only the distinct ones).

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

Adding to 12021121002000 its reverse (20012112021), we get a palindrome (12041133114021).

The spelling of 12021121002000 in words is "twelve trillion, twenty-one billion, one hundred twenty-one million, two thousand".