210120212101 has 8 divisors (see below), whose sum is σ = 213934971224. Its totient is φ = 206317393920.

The previous prime is 210120212083. The next prime is 210120212167. The reversal of 210120212101 is 101212021012.

It can be written as a sum of positive squares in 4 ways, for example, as 71176904100 + 138943308001 = 266790^2 + 372751^2 .

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 210120212101 - 2²¹ = 210118114949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210120213101) 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, 2949720 + ... + 3020113.

It is an arithmetic number, because the mean of its divisors is an integer number (26741871403).

Almost surely, 2^210120212101 is an apocalyptic number.

It is an amenable number.

210120212101 is a deficient number, since it is larger than the sum of its proper divisors (3814759123).

210120212101 is an equidigital number, since it uses as much as digits as its factorization.

210120212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5970471.

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

Adding to 210120212101 its reverse (101212021012), we get a palindrome (311332233113).

The spelling of 210120212101 in words is "two hundred ten billion, one hundred twenty million, two hundred twelve thousand, one hundred one".