12221011021100 has 72 divisors (see below), whose sum is σ = 30319510260480. Its totient is φ = 4188484480320.

The previous prime is 12221011021091. The next prime is 12221011021117. The reversal of 12221011021100 is 112011012221.

It is a super-2 number, since 2×12221011021100² (a number of 27 digits) contains 22 as substring.

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, 1421624 + ... + 5144223.

Almost surely, 2^{12221011021100} is an apocalyptic number.

12221011021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221011021100 is an abundant number, since it is smaller than the sum of its proper divisors (18098499239380).

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

12221011021100 is a wasteful number, since it uses less digits than its factorization.

12221011021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6568527 (or 6568520 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12221011021100 its reverse (112011012221), we get a palindrome (12333022033321).

The spelling of 12221011021100 in words is "twelve trillion, two hundred twenty-one billion, eleven million, twenty-one thousand, one hundred".