12102121189 has 2 divisors, whose sum is σ = 12102121190. Its totient is φ = 12102121188.

The previous prime is 12102121159. The next prime is 12102121253. The reversal of 12102121189 is 98112120121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10436256964 + 1665864225 = 102158^2 + 40815^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102121189 - 2²¹ = 12100024037 is a prime.

It is a super-2 number, since 2×12102121189² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12102121159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051060594 + 6051060595.

It is an arithmetic number, because the mean of its divisors is an integer number (6051060595).

Almost surely, 2^12102121189 is an apocalyptic number.

It is an amenable number.

12102121189 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102121189 is an equidigital number, since it uses as much as digits as its factorization.

12102121189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 28.

It can be divided in two parts, 12 and 102121189, that added together give a palindrome (102121201).

The spelling of 12102121189 in words is "twelve billion, one hundred two million, one hundred twenty-one thousand, one hundred eighty-nine".