12021211212120 has 192 divisors, whose sum is σ = 42906704724000. Its totient is φ = 2894674268160.

The previous prime is 12021211212119. The next prime is 12021211212121. The reversal of 12021211212120 is 2121211212021.

12021211212120 is a `hidden beast` number, since 120 + 2 + 1 + 211 + 212 + 120 = 666.

It is an interprime number because it is at equal distance from previous prime (12021211212119) and next prime (12021211212121).

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

It is a junction number, because it is equal to n+sod(n) for n = 12021211212093 and 12021211212102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021211212121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9596737 + ... + 10776816.

Almost surely, 2^{12021211212120} is an apocalyptic number.

12021211212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021211212120 is an abundant number, since it is smaller than the sum of its proper divisors (30885493511880).

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

12021211212120 is a wasteful number, since it uses less digits than its factorization.

12021211212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20373730 (or 20373723 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12021211212120 its reverse (2121211212021), we get a palindrome (14142422424141).

Subtracting from 12021211212120 its reverse (2121211212021), we obtain a palindrome (9900000000099).

The spelling of 12021211212120 in words is "twelve trillion, twenty-one billion, two hundred eleven million, two hundred twelve thousand, one hundred twenty".