121212201111929 has 2 divisors, whose sum is σ = 121212201111930. Its totient is φ = 121212201111928.

The previous prime is 121212201111923. The next prime is 121212201112033. The reversal of 121212201111929 is 929111102212121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108620689515625 + 12591511596304 = 10422125^2 + 3548452^2 .

It is a cyclic number.

It is not a de Polignac number, because 121212201111929 - 2²⁸ = 121211932676473 is a prime.

It is a super-2 number, since 2×121212201111929² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121212201111923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606100555964 + 60606100555965.

It is an arithmetic number, because the mean of its divisors is an integer number (60606100555965).

Almost surely, 2^{121212201111929} is an apocalyptic number.

It is an amenable number.

121212201111929 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212201111929 is an equidigital number, since it uses as much as digits as its factorization.

121212201111929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 35.

The spelling of 121212201111929 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred one million, one hundred eleven thousand, nine hundred twenty-nine".