12231220231221 has 16 divisors (see below), whose sum is σ = 17269030742400. Its totient is φ = 7673857476608.

The previous prime is 12231220231169. The next prime is 12231220231229. The reversal of 12231220231221 is 12213202213221.

It is a cyclic number.

It is not a de Polignac number, because 12231220231221 - 2⁹ = 12231220230709 is a prime.

It is a super-3 number, since 3×12231220231221³ (a number of 40 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12231220231191 and 12231220231200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231220231229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9276636 + ... + 10512773.

It is an arithmetic number, because the mean of its divisors is an integer number (1079314421400).

Almost surely, 2^{12231220231221} is an apocalyptic number.

It is an amenable number.

12231220231221 is a deficient number, since it is larger than the sum of its proper divisors (5037810511179).

12231220231221 is a wasteful number, since it uses less digits than its factorization.

12231220231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19801548.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 12231220231221 its reverse (12213202213221), we get a palindrome (24444422444442).

The spelling of 12231220231221 in words is "twelve trillion, two hundred thirty-one billion, two hundred twenty million, two hundred thirty-one thousand, two hundred twenty-one".