12221001121111 has 2 divisors, whose sum is σ = 12221001121112. Its totient is φ = 12221001121110.

The previous prime is 12221001121097. The next prime is 12221001121139. The reversal of 12221001121111 is 11112110012221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12221001121111 - 2⁹ = 12221001120599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221001121151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110500560555 + 6110500560556.

It is an arithmetic number, because the mean of its divisors is an integer number (6110500560556).

Almost surely, 2^{12221001121111} is an apocalyptic number.

12221001121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221001121111 is an equidigital number, since it uses as much as digits as its factorization.

12221001121111 is an evil number, because the sum of its binary digits is even.

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

Adding to 12221001121111 its reverse (11112110012221), we get a palindrome (23333111133332).

The spelling of 12221001121111 in words is "twelve trillion, two hundred twenty-one billion, one million, one hundred twenty-one thousand, one hundred eleven".