12012202202221 has 8 divisors (see below), whose sum is σ = 12936279053880. Its totient is φ = 11088134107392.

The previous prime is 12012202202183. The next prime is 12012202202249. The reversal of 12012202202221 is 12220220221021.

It can be written as a sum of positive squares in 4 ways, for example, as 971434956996 + 11040767245225 = 985614^2 + 3322765^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12012202202221 - 2⁷ = 12012202202093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012202202291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812241 + ... + 4968313.

It is an arithmetic number, because the mean of its divisors is an integer number (1617034881735).

Almost surely, 2^{12012202202221} is an apocalyptic number.

It is an amenable number.

12012202202221 is a deficient number, since it is larger than the sum of its proper divisors (924076851659).

12012202202221 is a wasteful number, since it uses less digits than its factorization.

12012202202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4378415.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12012202202221 its reverse (12220220221021), we get a palindrome (24232422423242).

The spelling of 12012202202221 in words is "twelve trillion, twelve billion, two hundred two million, two hundred two thousand, two hundred twenty-one".