12100121212009 has 2 divisors, whose sum is σ = 12100121212010. Its totient is φ = 12100121212008.

The previous prime is 12100121211973. The next prime is 12100121212019. The reversal of 12100121212009 is 90021212100121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7930683925609 + 4169437286400 = 2816147^2 + 2041920^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100121212009 - 2²¹ = 12100119114857 is a prime.

It is a super-2 number, since 2×12100121212009² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12100121212019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050060606004 + 6050060606005.

It is an arithmetic number, because the mean of its divisors is an integer number (6050060606005).

Almost surely, 2^{12100121212009} is an apocalyptic number.

It is an amenable number.

12100121212009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12100121212009 is an equidigital number, since it uses as much as digits as its factorization.

12100121212009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 12100121212009 in words is "twelve trillion, one hundred billion, one hundred twenty-one million, two hundred twelve thousand, nine".