12221021101 has 4 divisors (see below), whose sum is σ = 12221280000. Its totient is φ = 12220762204.

The previous prime is 12221021053. The next prime is 12221021147. The reversal of 12221021101 is 10112012221.

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 a cyclic number.

It is not a de Polignac number, because 12221021101 - 2¹¹ = 12221019053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221021191) 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, 36301 + ... + 160498.

It is an arithmetic number, because the mean of its divisors is an integer number (3055320000).

Almost surely, 2^12221021101 is an apocalyptic number.

It is an amenable number.

12221021101 is a deficient number, since it is larger than the sum of its proper divisors (258899).

12221021101 is an equidigital number, since it uses as much as digits as its factorization.

12221021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258898.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12221021101 its reverse (10112012221), we get a palindrome (22333033322).

The spelling of 12221021101 in words is "twelve billion, two hundred twenty-one million, twenty-one thousand, one hundred one".