210001202121 has 8 divisors (see below), whose sum is σ = 280608983424. Its totient is φ = 139697111120.

The previous prime is 210001202111. The next prime is 210001202161. The reversal of 210001202121 is 121202100012.

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 210001202121 - 2⁹ = 210001201609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210001202097 and 210001202106.

It is not an unprimeable number, because it can be changed into a prime (210001202111) 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, 75920961 + ... + 75923726.

It is an arithmetic number, because the mean of its divisors is an integer number (35076122928).

Almost surely, 2^210001202121 is an apocalyptic number.

It is an amenable number.

210001202121 is a deficient number, since it is larger than the sum of its proper divisors (70607781303).

210001202121 is a wasteful number, since it uses less digits than its factorization.

210001202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151845151.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210001202121 its reverse (121202100012), we get a palindrome (331203302133).

The spelling of 210001202121 in words is "two hundred ten billion, one million, two hundred two thousand, one hundred twenty-one".