12021222212120 has 64 divisors (see below), whose sum is σ = 31242320848800. Its totient is φ = 4114215086080.

The previous prime is 12021222212063. The next prime is 12021222212179. The reversal of 12021222212120 is 2121222212021.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12021222212092 and 12021222212101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 803550155 + ... + 803565114.

Almost surely, 2^{12021222212120} is an apocalyptic number.

12021222212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021222212120 is an abundant number, since it is smaller than the sum of its proper divisors (19221098636680).

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

12021222212120 is a wasteful number, since it uses less digits than its factorization.

12021222212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607115308 (or 1607115304 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12021222212120 its reverse (2121222212021), we get a palindrome (14142444424141).

Subtracting from 12021222212120 its reverse (2121222212021), we obtain a palindrome (9900000000099).

The spelling of 12021222212120 in words is "twelve trillion, twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, one hundred twenty".