120211001200021 has 2 divisors, whose sum is σ = 120211001200022. Its totient is φ = 120211001200020.

The previous prime is 120211001200007. The next prime is 120211001200027. The reversal of 120211001200021 is 120002100112021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98438642640625 + 21772358559396 = 9921625^2 + 4666086^2 .

It is a cyclic number.

It is not a de Polignac number, because 120211001200021 - 2⁴³ = 111414908177813 is a prime.

It is a super-2 number, since 2×120211001200021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 120211001199974 and 120211001200010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120211001200027) 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, 60105500600010 + 60105500600011.

It is an arithmetic number, because the mean of its divisors is an integer number (60105500600011).

Almost surely, 2^{120211001200021} is an apocalyptic number.

It is an amenable number.

120211001200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

120211001200021 is an equidigital number, since it uses as much as digits as its factorization.

120211001200021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 120211001200021 its reverse (120002100112021), we get a palindrome (240213101312042).

The spelling of 120211001200021 in words is "one hundred twenty trillion, two hundred eleven billion, one million, two hundred thousand, twenty-one".