212012123321 has 16 divisors (see below), whose sum is σ = 220276324800. Its totient is φ = 203951920128.

The previous prime is 212012123251. The next prime is 212012123363. The reversal of 212012123321 is 123321210212.

It is a cyclic number.

It is not a de Polignac number, because 212012123321 - 2²² = 212007929017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212012123293 and 212012123302.

It is not an unprimeable number, because it can be changed into a prime (212012123221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301226 + ... + 717468.

It is an arithmetic number, because the mean of its divisors is an integer number (13767270300).

Almost surely, 2^212012123321 is an apocalyptic number.

It is an amenable number.

212012123321 is a deficient number, since it is larger than the sum of its proper divisors (8264201479).

212012123321 is an equidigital number, since it uses as much as digits as its factorization.

212012123321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416488.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212012123321 its reverse (123321210212), we get a palindrome (335333333533).

The spelling of 212012123321 in words is "two hundred twelve billion, twelve million, one hundred twenty-three thousand, three hundred twenty-one".