120001220200021 has 2 divisors, whose sum is σ = 120001220200022. Its totient is φ = 120001220200020.

The previous prime is 120001220199919. The next prime is 120001220200027. The reversal of 120001220200021 is 120002022100021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116937967653796 + 3063252546225 = 10813786^2 + 1750215^2 .

It is a cyclic number.

It is not a de Polignac number, because 120001220200021 - 2⁷ = 120001220199893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120001220199974 and 120001220200010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120001220200027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60000610100010 + 60000610100011.

It is an arithmetic number, because the mean of its divisors is an integer number (60000610100011).

Almost surely, 2^{120001220200021} is an apocalyptic number.

It is an amenable number.

120001220200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

120001220200021 is an equidigital number, since it uses as much as digits as its factorization.

120001220200021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 120001220200021 its reverse (120002022100021), we get a palindrome (240003242300042).

The spelling of 120001220200021 in words is "one hundred twenty trillion, one billion, two hundred twenty million, two hundred thousand, twenty-one".