210120000220001 has 4 divisors (see below), whose sum is σ = 213564590387604. Its totient is φ = 206675410052400.

The previous prime is 210120000219977. The next prime is 210120000220069. The reversal of 210120000220001 is 100022000021012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16425309424225 + 193694690795776 = 4052815^2 + 13917424^2 .

It is a cyclic number.

It is not a de Polignac number, because 210120000220001 - 2⁶ = 210120000219937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210120000222001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1722295083710 + ... + 1722295083831.

It is an arithmetic number, because the mean of its divisors is an integer number (53391147596901).

Almost surely, 2^{210120000220001} is an apocalyptic number.

It is an amenable number.

210120000220001 is a deficient number, since it is larger than the sum of its proper divisors (3444590167603).

210120000220001 is an equidigital number, since it uses as much as digits as its factorization.

210120000220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3444590167602.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 210120000220001 its reverse (100022000021012), we get a palindrome (310142000241013).

The spelling of 210120000220001 in words is "two hundred ten trillion, one hundred twenty billion, two hundred twenty thousand, one".