12021121202004 has 18 divisors (see below), whose sum is σ = 30386723038490. Its totient is φ = 4007040400656.

The previous prime is 12021121201951. The next prime is 12021121202071. The reversal of 12021121202004 is 40020212112021.

It can be written as a sum of positive squares in only one way, i.e., 9731891681604 + 2289229520400 = 3119598^2 + 1513020^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166960016659 + ... + 166960016730.

Almost surely, 2^{12021121202004} is an apocalyptic number.

It is an amenable number.

12021121202004 is an abundant number, since it is smaller than the sum of its proper divisors (18365601836486).

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

12021121202004 is a wasteful number, since it uses less digits than its factorization.

12021121202004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333920033399 (or 333920033394 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12021121202004 its reverse (40020212112021), we get a palindrome (52041333314025).

The spelling of 12021121202004 in words is "twelve trillion, twenty-one billion, one hundred twenty-one million, two hundred two thousand, four".