12021232211 has 2 divisors, whose sum is σ = 12021232212. Its totient is φ = 12021232210.

The previous prime is 12021232183. The next prime is 12021232229. The reversal of 12021232211 is 11223212021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12021232211 - 2²⁶ = 11954123347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12021232211.

It is not a weakly prime, because it can be changed into another prime (12021232261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010616105 + 6010616106.

It is an arithmetic number, because the mean of its divisors is an integer number (6010616106).

Almost surely, 2^12021232211 is an apocalyptic number.

12021232211 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021232211 is an equidigital number, since it uses as much as digits as its factorization.

12021232211 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 17.

Adding to 12021232211 its reverse (11223212021), we get a palindrome (23244444232).

The spelling of 12021232211 in words is "twelve billion, twenty-one million, two hundred thirty-two thousand, two hundred eleven".