12021011221111 has 2 divisors, whose sum is σ = 12021011221112. Its totient is φ = 12021011221110.

The previous prime is 12021011221067. The next prime is 12021011221139. The reversal of 12021011221111 is 11112211012021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12021011221111 - 2⁷ = 12021011220983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021011221211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010505610555 + 6010505610556.

It is an arithmetic number, because the mean of its divisors is an integer number (6010505610556).

Almost surely, 2^{12021011221111} is an apocalyptic number.

12021011221111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021011221111 is an equidigital number, since it uses as much as digits as its factorization.

12021011221111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 12021011221111 its reverse (11112211012021), we get a palindrome (23133222233132).

The spelling of 12021011221111 in words is "twelve trillion, twenty-one billion, eleven million, two hundred twenty-one thousand, one hundred eleven".