212021112321 has 48 divisors (see below), whose sum is σ = 319100446080. Its totient is φ = 135538824960.

The previous prime is 212021112307. The next prime is 212021112343. The reversal of 212021112321 is 123211120212.

212021112321 is a `hidden beast` number, since 2 + 120 + 211 + 12 + 321 = 666.

It is not a de Polignac number, because 212021112321 - 2⁶ = 212021112257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212021112294 and 212021112303.

It is not an unprimeable number, because it can be changed into a prime (212021112301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9205606 + ... + 9228608.

It is an arithmetic number, because the mean of its divisors is an integer number (6647925960).

Almost surely, 2^212021112321 is an apocalyptic number.

It is an amenable number.

212021112321 is a deficient number, since it is larger than the sum of its proper divisors (107079333759).

212021112321 is a wasteful number, since it uses less digits than its factorization.

212021112321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23446 (or 23443 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 212021112321 its reverse (123211120212), we get a palindrome (335232232533).

The spelling of 212021112321 in words is "two hundred twelve billion, twenty-one million, one hundred twelve thousand, three hundred twenty-one".