12021100011061 has 2 divisors, whose sum is σ = 12021100011062. Its totient is φ = 12021100011060.

The previous prime is 12021100011059. The next prime is 12021100011181. The reversal of 12021100011061 is 16011000112021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8418673235025 + 3602426776036 = 2901495^2 + 1898006^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021100011061 - 2¹ = 12021100011059 is a prime.

Together with 12021100011059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021100011461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010550005530 + 6010550005531.

It is an arithmetic number, because the mean of its divisors is an integer number (6010550005531).

Almost surely, 2^{12021100011061} is an apocalyptic number.

It is an amenable number.

12021100011061 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021100011061 is an equidigital number, since it uses as much as digits as its factorization.

12021100011061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 12021100011061 its reverse (16011000112021), we get a palindrome (28032100123082).

The spelling of 12021100011061 in words is "twelve trillion, twenty-one billion, one hundred million, eleven thousand, sixty-one".