12102402121 has 2 divisors, whose sum is σ = 12102402122. Its totient is φ = 12102402120.

The previous prime is 12102402101. The next prime is 12102402133. The reversal of 12102402121 is 12120420121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11818951225 + 283450896 = 108715^2 + 16836^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102402121 - 2¹¹ = 12102400073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12102402095 and 12102402104.

It is not a weakly prime, because it can be changed into another prime (12102402101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051201060 + 6051201061.

It is an arithmetic number, because the mean of its divisors is an integer number (6051201061).

Almost surely, 2^12102402121 is an apocalyptic number.

It is an amenable number.

12102402121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102402121 is an equidigital number, since it uses as much as digits as its factorization.

12102402121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12102402121 its reverse (12120420121), we get a palindrome (24222822242).

The spelling of 12102402121 in words is "twelve billion, one hundred two million, four hundred two thousand, one hundred twenty-one".