12202111001221 has 4 divisors (see below), whose sum is σ = 12432339510732. Its totient is φ = 11971882491712.

The previous prime is 12202111001161. The next prime is 12202111001323. The reversal of 12202111001221 is 12210011120221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4947572770596 + 7254538230625 = 2224314^2 + 2693425^2 .

It is a cyclic number.

It is not a de Polignac number, because 12202111001221 - 2²⁵ = 12202077446789 is a prime.

It is a super-2 number, since 2×12202111001221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12202111001195 and 12202111001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12202111001021) 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, 115114254676 + ... + 115114254781.

It is an arithmetic number, because the mean of its divisors is an integer number (3108084877683).

Almost surely, 2^{12202111001221} is an apocalyptic number.

It is an amenable number.

12202111001221 is a deficient number, since it is larger than the sum of its proper divisors (230228509511).

12202111001221 is an equidigital number, since it uses as much as digits as its factorization.

12202111001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230228509510.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12202111001221 its reverse (12210011120221), we get a palindrome (24412122121442).

The spelling of 12202111001221 in words is "twelve trillion, two hundred two billion, one hundred eleven million, one thousand, two hundred twenty-one".