12020112121 has 2 divisors, whose sum is σ = 12020112122. Its totient is φ = 12020112120.

The previous prime is 12020112109. The next prime is 12020112151. The reversal of 12020112121 is 12121102021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8168544400 + 3851567721 = 90380^2 + 62061^2 .

It is a cyclic number.

It is not a de Polignac number, because 12020112121 - 2¹¹ = 12020110073 is a prime.

It is a super-2 number, since 2×12020112121² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12020112151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010056060 + 6010056061.

It is an arithmetic number, because the mean of its divisors is an integer number (6010056061).

Almost surely, 2^12020112121 is an apocalyptic number.

It is an amenable number.

12020112121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12020112121 is an equidigital number, since it uses as much as digits as its factorization.

12020112121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 12020112121 its reverse (12121102021), we get a palindrome (24141214142).

The spelling of 12020112121 in words is "twelve billion, twenty million, one hundred twelve thousand, one hundred twenty-one".