12122000110021 has 4 divisors (see below), whose sum is σ = 12122990400844. Its totient is φ = 12121009819200.

The previous prime is 12122000109917. The next prime is 12122000110063. The reversal of 12122000110021 is 12001100022121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5505658659396 + 6616341450625 = 2346414^2 + 2572225^2 .

It is a cyclic number.

It is not a de Polignac number, because 12122000110021 - 2⁷ = 12122000109893 is a prime.

It is a super-2 number, since 2×12122000110021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12122000109983 and 12122000110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122000110321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495127050 + ... + 495151531.

It is an arithmetic number, because the mean of its divisors is an integer number (3030747600211).

Almost surely, 2^{12122000110021} is an apocalyptic number.

It is an amenable number.

12122000110021 is a deficient number, since it is larger than the sum of its proper divisors (990290823).

12122000110021 is an equidigital number, since it uses as much as digits as its factorization.

12122000110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990290822.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12122000110021 its reverse (12001100022121), we get a palindrome (24123100132142).

The spelling of 12122000110021 in words is "twelve trillion, one hundred twenty-two billion, one hundred ten thousand, twenty-one".