12021200221100 has 72 divisors (see below), whose sum is σ = 29858232471648. Its totient is φ = 4115242483200.

The previous prime is 12021200221099. The next prime is 12021200221171. The reversal of 12021200221100 is 112200212021.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12692321 + ... + 13606520.

Almost surely, 2^{12021200221100} is an apocalyptic number.

12021200221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021200221100 is an abundant number, since it is smaller than the sum of its proper divisors (17837032250548).

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

12021200221100 is a wasteful number, since it uses less digits than its factorization.

12021200221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26299515 (or 26299508 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12021200221100 its reverse (112200212021), we get a palindrome (12133400433121).

The spelling of 12021200221100 in words is "twelve trillion, twenty-one billion, two hundred million, two hundred twenty-one thousand, one hundred".