12021033121 has 2 divisors, whose sum is σ = 12021033122. Its totient is φ = 12021033120.

The previous prime is 12021033113. The next prime is 12021033133. The reversal of 12021033121 is 12133012021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8461240225 + 3559792896 = 91985^2 + 59664^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021033121 - 2³ = 12021033113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021033095 and 12021033104.

It is not a weakly prime, because it can be changed into another prime (12021033821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010516560 + 6010516561.

It is an arithmetic number, because the mean of its divisors is an integer number (6010516561).

Almost surely, 2^12021033121 is an apocalyptic number.

It is an amenable number.

12021033121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021033121 is an equidigital number, since it uses as much as digits as its factorization.

12021033121 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 16.

Adding to 12021033121 its reverse (12133012021), we get a palindrome (24154045142).

The spelling of 12021033121 in words is "twelve billion, twenty-one million, thirty-three thousand, one hundred twenty-one".