12021222220000 has 120 divisors (see below), whose sum is σ = 33798868787376. Its totient is φ = 4121561856000.

The previous prime is 12021222219943. The next prime is 12021222220003. The reversal of 12021222220000 is 2222212021.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021222220003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 42792937 + ... + 43072936.

Almost surely, 2^{12021222220000} is an apocalyptic number.

12021222220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021222220000 is an abundant number, since it is smaller than the sum of its proper divisors (21777646567376).

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

12021222220000 is an frugal number, since it uses more digits than its factorization.

12021222220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85865910 (or 85865887 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 12021222220000 its reverse (2222212021), we get a palindrome (12023444432021).

The spelling of 12021222220000 in words is "twelve trillion, twenty-one billion, two hundred twenty-two million, two hundred twenty thousand".