12221123333021 has 4 divisors (see below), whose sum is σ = 12296099549952. Its totient is φ = 12146147116092.

The previous prime is 12221123332997. The next prime is 12221123333113. The reversal of 12221123333021 is 12033332112221.

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 a de Polignac number, because none of the positive numbers 2^k-12221123333021 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 (12221123336021) 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, 37488108221 + ... + 37488108546.

It is an arithmetic number, because the mean of its divisors is an integer number (3074024887488).

Almost surely, 2^{12221123333021} is an apocalyptic number.

It is an amenable number.

12221123333021 is a deficient number, since it is larger than the sum of its proper divisors (74976216931).

12221123333021 is an equidigital number, since it uses as much as digits as its factorization.

12221123333021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74976216930.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 12221123333021 its reverse (12033332112221), we get a palindrome (24254455445242).

The spelling of 12221123333021 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-three million, three hundred thirty-three thousand, twenty-one".