121200020999899 has 2 divisors, whose sum is σ = 121200020999900. Its totient is φ = 121200020999898.

The previous prime is 121200020999851. The next prime is 121200021000031. The reversal of 121200020999899 is 998999020002121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121200020999899 - 2⁴¹ = 119000997744347 is a prime.

It is not a weakly prime, because it can be changed into another prime (121200020799899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600010499949 + 60600010499950.

It is an arithmetic number, because the mean of its divisors is an integer number (60600010499950).

Almost surely, 2^{121200020999899} is an apocalyptic number.

121200020999899 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200020999899 is an equidigital number, since it uses as much as digits as its factorization.

121200020999899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3779136, while the sum is 61.

The spelling of 121200020999899 in words is "one hundred twenty-one trillion, two hundred billion, twenty million, nine hundred ninety-nine thousand, eight hundred ninety-nine".