212200320421 has 4 divisors (see below), whose sum is σ = 212347785600. Its totient is φ = 212052855244.

The previous prime is 212200320403. The next prime is 212200320427. The reversal of 212200320421 is 124023002212.

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 212200320421 - 2⁵ = 212200320389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212200320427) 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, 73730431 + ... + 73733308.

It is an arithmetic number, because the mean of its divisors is an integer number (53086946400).

Almost surely, 2^212200320421 is an apocalyptic number.

It is an amenable number.

212200320421 is a deficient number, since it is larger than the sum of its proper divisors (147465179).

212200320421 is a wasteful number, since it uses less digits than its factorization.

212200320421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147465178.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 212200320421 its reverse (124023002212), we get a palindrome (336223322633).

The spelling of 212200320421 in words is "two hundred twelve billion, two hundred million, three hundred twenty thousand, four hundred twenty-one".