12222221100021 has 12 divisors (see below), whose sum is σ = 17696453785920. Its totient is φ = 8128700745000.

The previous prime is 12222221100017. The next prime is 12222221100053. The reversal of 12222221100021 is 12000112222221.

It is a happy number.

It is not a de Polignac number, because 12222221100021 - 2² = 12222221100017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12222221099967 and 12222221100003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222221170021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1620550605 + ... + 1620558146.

It is an arithmetic number, because the mean of its divisors is an integer number (1474704482160).

Almost surely, 2^{12222221100021} is an apocalyptic number.

It is an amenable number.

12222221100021 is a deficient number, since it is larger than the sum of its proper divisors (5474232685899).

12222221100021 is a wasteful number, since it uses less digits than its factorization.

12222221100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3241109176 (or 3241109173 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12222221100021 its reverse (12000112222221), we get a palindrome (24222333322242).

The spelling of 12222221100021 in words is "twelve trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred thousand, twenty-one".