12222011022221 has 64 divisors (see below), whose sum is σ = 16625778204672. Its totient is φ = 8676007200000.

The previous prime is 12222011022187. The next prime is 12222011022257.

12222011022221 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-12222011022221 is a prime.

It is a super-2 number, since 2×12222011022221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12222011022193 and 12222011022202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222011022421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31248056 + ... + 31636766.

It is an arithmetic number, because the mean of its divisors is an integer number (259777784448).

Almost surely, 2^{12222011022221} is an apocalyptic number.

12222011022221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12222011022221 is a deficient number, since it is larger than the sum of its proper divisors (4403767182451).

12222011022221 is a wasteful number, since it uses less digits than its factorization.

12222011022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389154.

The product of its (nonzero) digits is 256, while the sum is 20.

It can be divided in two parts, 1222201 and 1022221, that added together give a palindrome (2244422).

The spelling of 12222011022221 in words is "twelve trillion, two hundred twenty-two billion, eleven million, twenty-two thousand, two hundred twenty-one".