212200200010021 has 4 divisors (see below), whose sum is σ = 212200777763200. Its totient is φ = 212199622256844.

The previous prime is 212200200009997. The next prime is 212200200010027. The reversal of 212200200010021 is 120010002002212.

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 212200200010021 - 2⁹ = 212200200009509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212200200009983 and 212200200010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212200200010027) 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, 288325311 + ... + 289060348.

It is an arithmetic number, because the mean of its divisors is an integer number (53050194440800).

Almost surely, 2^{212200200010021} is an apocalyptic number.

It is an amenable number.

212200200010021 is a deficient number, since it is larger than the sum of its proper divisors (577753179).

212200200010021 is an equidigital number, since it uses as much as digits as its factorization.

212200200010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577753178.

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

Adding to 212200200010021 its reverse (120010002002212), we get a palindrome (332210202012233).

The spelling of 212200200010021 in words is "two hundred twelve trillion, two hundred billion, two hundred million, ten thousand, twenty-one".