2121213222 has 12 divisors (see below), whose sum is σ = 4595962020. Its totient is φ = 707071068.

The previous prime is 2121213197. The next prime is 2121213239. The reversal of 2121213222 is 2223121212.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 117845179 = 2121213222 / (2 + 1 + 2 + 1 + 2 + 1 + 3 + 2 + 2 + 2).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 2121213195 and 2121213204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58922572 + ... + 58922607.

It is an arithmetic number, because the mean of its divisors is an integer number (382996835).

Almost surely, 2^2121213222 is an apocalyptic number.

2121213222 is an abundant number, since it is smaller than the sum of its proper divisors (2474748798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121213222 is a wasteful number, since it uses less digits than its factorization.

2121213222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117845187 (or 117845184 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 2121213222 is about 46056.6305975589. The cubic root of 2121213222 is about 1284.8766649733.

Adding to 2121213222 its reverse (2223121212), we get a palindrome (4344334434).

The spelling of 2121213222 in words is "two billion, one hundred twenty-one million, two hundred thirteen thousand, two hundred twenty-two".