202110210021 has 8 divisors (see below), whose sum is σ = 269484298720. Its totient is φ = 134738130672.

The previous prime is 202110210013. The next prime is 202110210037. The reversal of 202110210021 is 120012011202.

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

It is not a de Polignac number, because 202110210021 - 2³ = 202110210013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202110209979 and 202110210006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202110212021) 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, 249451 + ... + 682968.

It is an arithmetic number, because the mean of its divisors is an integer number (33685537340).

Almost surely, 2^202110210021 is an apocalyptic number.

It is an amenable number.

202110210021 is a deficient number, since it is larger than the sum of its proper divisors (67374088699).

202110210021 is an equidigital number, since it uses as much as digits as its factorization.

202110210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004675.

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

Adding to 202110210021 its reverse (120012011202), we get a palindrome (322122221223).

The spelling of 202110210021 in words is "two hundred two billion, one hundred ten million, two hundred ten thousand, twenty-one".