212321021222 has 8 divisors (see below), whose sum is σ = 323234987736. Its totient is φ = 104576025312.

The previous prime is 212321021221. The next prime is 212321021251. The reversal of 212321021222 is 222120123212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 212321021194 and 212321021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212321021221) 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, 792242483 + ... + 792242750.

It is an arithmetic number, because the mean of its divisors is an integer number (40404373467).

Almost surely, 2^212321021222 is an apocalyptic number.

212321021222 is a deficient number, since it is larger than the sum of its proper divisors (110913966514).

212321021222 is a wasteful number, since it uses less digits than its factorization.

212321021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584485302.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 212321021222 its reverse (222120123212), we get a palindrome (434441144434).

The spelling of 212321021222 in words is "two hundred twelve billion, three hundred twenty-one million, twenty-one thousand, two hundred twenty-two".