120021220183817 has 2 divisors, whose sum is σ = 120021220183818. Its totient is φ = 120021220183816.

The previous prime is 120021220183793. The next prime is 120021220183831. The reversal of 120021220183817 is 718381022120021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116288379796681 + 3732840387136 = 10783709^2 + 1932056^2 .

It is a cyclic number.

It is not a de Polignac number, because 120021220183817 - 2²² = 120021215989513 is a prime.

It is not a weakly prime, because it can be changed into another prime (120021220180817) 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, 60010610091908 + 60010610091909.

It is an arithmetic number, because the mean of its divisors is an integer number (60010610091909).

Almost surely, 2^{120021220183817} is an apocalyptic number.

It is an amenable number.

120021220183817 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021220183817 is an equidigital number, since it uses as much as digits as its factorization.

120021220183817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 38.

The spelling of 120021220183817 in words is "one hundred twenty trillion, twenty-one billion, two hundred twenty million, one hundred eighty-three thousand, eight hundred seventeen".