12021110121109 has 2 divisors, whose sum is σ = 12021110121110. Its totient is φ = 12021110121108.

The previous prime is 12021110121067. The next prime is 12021110121127. The reversal of 12021110121109 is 90112101112021.

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., 7854931102225 + 4166179018884 = 2802665^2 + 2041122^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021110121109 - 2²¹ = 12021108023957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12021110121109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021110121509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010555060554 + 6010555060555.

It is an arithmetic number, because the mean of its divisors is an integer number (6010555060555).

Almost surely, 2^{12021110121109} is an apocalyptic number.

It is an amenable number.

12021110121109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021110121109 is an equidigital number, since it uses as much as digits as its factorization.

12021110121109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 12021110121109 in words is "twelve trillion, twenty-one billion, one hundred ten million, one hundred twenty-one thousand, one hundred nine".