212321020230221 has 64 divisors (see below), whose sum is σ = 251924708044800. Its totient is φ = 175208953920000.

The previous prime is 212321020230169. The next prime is 212321020230299. The reversal of 212321020230221 is 122032020123212.

It is a happy number.

It is not a de Polignac number, because 212321020230221 - 2¹⁸ = 212321019968077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212321020232221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11935514195 + ... + 11935531983.

It is an arithmetic number, because the mean of its divisors is an integer number (3936323563200).

Almost surely, 2^{212321020230221} is an apocalyptic number.

It is an amenable number.

212321020230221 is a deficient number, since it is larger than the sum of its proper divisors (39603687814579).

212321020230221 is a wasteful number, since it uses less digits than its factorization.

212321020230221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21290.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 212321020230221 its reverse (122032020123212), we get a palindrome (334353040353433).

The spelling of 212321020230221 in words is "two hundred twelve trillion, three hundred twenty-one billion, twenty million, two hundred thirty thousand, two hundred twenty-one".