210120222001 has 4 divisors (see below), whose sum is σ = 210255872500. Its totient is φ = 209984571504.

The previous prime is 210120221977. The next prime is 210120222017. The reversal of 210120222001 is 100222021012.

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 108371981601 + 101748240400 = 329199^2 + 318980^2 .

It is a cyclic number.

It is not a de Polignac number, because 210120222001 - 2⁹ = 210120221489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210120222101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67822926 + ... + 67826023.

It is an arithmetic number, because the mean of its divisors is an integer number (52563968125).

Almost surely, 2^210120222001 is an apocalyptic number.

It is an amenable number.

210120222001 is a deficient number, since it is larger than the sum of its proper divisors (135650499).

210120222001 is a wasteful number, since it uses less digits than its factorization.

210120222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135650498.

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

Adding to 210120222001 its reverse (100222021012), we get a palindrome (310342243013).

The spelling of 210120222001 in words is "two hundred ten billion, one hundred twenty million, two hundred twenty-two thousand, one".