210020202121 has 8 divisors (see below), whose sum is σ = 214947516960. Its totient is φ = 205094847552.

The previous prime is 210020202083. The next prime is 210020202157. The reversal of 210020202121 is 121202020012.

It is a happy number.

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 210020202121 - 2¹⁷ = 210020071049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210020202181) 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, 272155 + ... + 702928.

It is an arithmetic number, because the mean of its divisors is an integer number (26868439620).

Almost surely, 2^210020202121 is an apocalyptic number.

It is an amenable number.

210020202121 is a deficient number, since it is larger than the sum of its proper divisors (4927314839).

210020202121 is an equidigital number, since it uses as much as digits as its factorization.

210020202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980135.

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

Adding to 210020202121 its reverse (121202020012), we get a palindrome (331222222133).

The spelling of 210020202121 in words is "two hundred ten billion, twenty million, two hundred two thousand, one hundred twenty-one".