12101122020021 has 16 divisors (see below), whose sum is σ = 16159283205120. Its totient is φ = 8055195824240.

The previous prime is 12101122020011. The next prime is 12101122020067. The reversal of 12101122020021 is 12002022110121.

It is a cyclic number.

It is not a de Polignac number, because 12101122020021 - 2¹³ = 12101122011829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101122020011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5002690 + ... + 7016348.

It is an arithmetic number, because the mean of its divisors is an integer number (1009955200320).

Almost surely, 2^{12101122020021} is an apocalyptic number.

It is an amenable number.

12101122020021 is a deficient number, since it is larger than the sum of its proper divisors (4058161185099).

12101122020021 is a wasteful number, since it uses less digits than its factorization.

12101122020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016696.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12101122020021 its reverse (12002022110121), we get a palindrome (24103144130142).

The spelling of 12101122020021 in words is "twelve trillion, one hundred one billion, one hundred twenty-two million, twenty thousand, twenty-one".