200210202100021 has 4 divisors (see below), whose sum is σ = 204469993634112. Its totient is φ = 195950410565932.

The previous prime is 200210202099979. The next prime is 200210202100033. The reversal of 200210202100021 is 120001202012002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 200210202100021 - 2¹¹ = 200210202097973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200210202099974 and 200210202100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200210202100621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2129895766975 + ... + 2129895767068.

It is an arithmetic number, because the mean of its divisors is an integer number (51117498408528).

Almost surely, 2^{200210202100021} is an apocalyptic number.

It is an amenable number.

200210202100021 is a deficient number, since it is larger than the sum of its proper divisors (4259791534091).

200210202100021 is an equidigital number, since it uses as much as digits as its factorization.

200210202100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4259791534090.

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

Adding to 200210202100021 its reverse (120001202012002), we get a palindrome (320211404112023).

The spelling of 200210202100021 in words is "two hundred trillion, two hundred ten billion, two hundred two million, one hundred thousand, twenty-one".