12200020111221 has 4 divisors (see below), whose sum is σ = 16266693481632. Its totient is φ = 8133346740812.

The previous prime is 12200020111211. The next prime is 12200020111231. The reversal of 12200020111221 is 12211102000221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (12200020111211) and next prime (12200020111231).

It is a cyclic number.

It is not a de Polignac number, because 12200020111221 - 2⁵ = 12200020111189 is a prime.

It is a super-2 number, since 2×12200020111221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12200020111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12200020111211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2033336685201 + ... + 2033336685206.

It is an arithmetic number, because the mean of its divisors is an integer number (4066673370408).

Almost surely, 2^{12200020111221} is an apocalyptic number.

It is an amenable number.

12200020111221 is a deficient number, since it is larger than the sum of its proper divisors (4066673370411).

12200020111221 is an equidigital number, since it uses as much as digits as its factorization.

12200020111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4066673370410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12200020111221 its reverse (12211102000221), we get a palindrome (24411122111442).

The spelling of 12200020111221 in words is "twelve trillion, two hundred billion, twenty million, one hundred eleven thousand, two hundred twenty-one".