12121001129 has 2 divisors, whose sum is σ = 12121001130. Its totient is φ = 12121001128.

The previous prime is 12121001119. The next prime is 12121001131. The reversal of 12121001129 is 92110012121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10195546729 + 1925454400 = 100973^2 + 43880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121001129 is a prime.

Together with 12121001131, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12121001129.

It is not a weakly prime, because it can be changed into another prime (12121001119) 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, 6060500564 + 6060500565.

It is an arithmetic number, because the mean of its divisors is an integer number (6060500565).

Almost surely, 2^12121001129 is an apocalyptic number.

It is an amenable number.

12121001129 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121001129 is an equidigital number, since it uses as much as digits as its factorization.

12121001129 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 20.

The spelling of 12121001129 in words is "twelve billion, one hundred twenty-one million, one thousand, one hundred twenty-nine".