121020121199959 has 2 divisors, whose sum is σ = 121020121199960. Its totient is φ = 121020121199958.

The previous prime is 121020121199953. The next prime is 121020121200029. The reversal of 121020121199959 is 959991121020121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121020121199959 is a prime.

It is a super-5 number, since 5×121020121199959⁵ (a number of 72 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121020121199953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510060599979 + 60510060599980.

It is an arithmetic number, because the mean of its divisors is an integer number (60510060599980).

Almost surely, 2^{121020121199959} is an apocalyptic number.

121020121199959 is a deficient number, since it is larger than the sum of its proper divisors (1).

121020121199959 is an equidigital number, since it uses as much as digits as its factorization.

121020121199959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 52.

The spelling of 121020121199959 in words is "one hundred twenty-one trillion, twenty billion, one hundred twenty-one million, one hundred ninety-nine thousand, nine hundred fifty-nine".