210120022001 has 8 divisors (see below), whose sum is σ = 214106707944. Its totient is φ = 206134156800.

The previous prime is 210120021997. The next prime is 210120022003. The reversal of 210120022001 is 100220021012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 121420887025 + 88699134976 = 348455^2 + 297824^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210120022001 - 2² = 210120021997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210120022003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324545 + ... + 724961.

It is an arithmetic number, because the mean of its divisors is an integer number (26763338493).

Almost surely, 2^210120022001 is an apocalyptic number.

It is an amenable number.

210120022001 is a deficient number, since it is larger than the sum of its proper divisors (3986685943).

210120022001 is an equidigital number, since it uses as much as digits as its factorization.

210120022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410371.

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

Adding to 210120022001 its reverse (100220021012), we get a palindrome (310340043013).

The spelling of 210120022001 in words is "two hundred ten billion, one hundred twenty million, twenty-two thousand, one".