12221220112021 has 8 divisors (see below), whose sum is σ = 12866692546080. Its totient is φ = 11575972710288.

The previous prime is 12221220111967. The next prime is 12221220112039. The reversal of 12221220112021 is 12021102212221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12221220112021 - 2³⁷ = 12083781158549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12221220112021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221220112081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56146591 + ... + 56363836.

It is an arithmetic number, because the mean of its divisors is an integer number (1608336568260).

Almost surely, 2^{12221220112021} is an apocalyptic number.

It is an amenable number.

12221220112021 is a deficient number, since it is larger than the sum of its proper divisors (645472434059).

12221220112021 is a wasteful number, since it uses less digits than its factorization.

12221220112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112516163.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12221220112021 its reverse (12021102212221), we get a palindrome (24242322324242).

The spelling of 12221220112021 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twelve thousand, twenty-one".