12002132221 has 2 divisors, whose sum is σ = 12002132222. Its totient is φ = 12002132220.

The previous prime is 12002132161. The next prime is 12002132231. The reversal of 12002132221 is 12223120021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8838632196 + 3163500025 = 94014^2 + 56245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12002132221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12002132195 and 12002132204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12002132231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6001066110 + 6001066111.

It is an arithmetic number, because the mean of its divisors is an integer number (6001066111).

Almost surely, 2^12002132221 is an apocalyptic number.

It is an amenable number.

12002132221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12002132221 is an equidigital number, since it uses as much as digits as its factorization.

12002132221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12002132221 its reverse (12223120021), we get a palindrome (24225252242).

The spelling of 12002132221 in words is "twelve billion, two million, one hundred thirty-two thousand, two hundred twenty-one".