121200029028899 has 2 divisors, whose sum is σ = 121200029028900. Its totient is φ = 121200029028898.

The previous prime is 121200029028887. The next prime is 121200029028931. The reversal of 121200029028899 is 998820920002121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121200029028899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121200029028899.

It is not a weakly prime, because it can be changed into another prime (121200029028499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600014514449 + 60600014514450.

It is an arithmetic number, because the mean of its divisors is an integer number (60600014514450).

Almost surely, 2^{121200029028899} is an apocalyptic number.

121200029028899 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200029028899 is an equidigital number, since it uses as much as digits as its factorization.

121200029028899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 53.

The spelling of 121200029028899 in words is "one hundred twenty-one trillion, two hundred billion, twenty-nine million, twenty-eight thousand, eight hundred ninety-nine".