2121222110 has 64 divisors (see below), whose sum is σ = 4545072000. Its totient is φ = 697385472.

The previous prime is 2121222109. The next prime is 2121222163. The reversal of 2121222110 is 112221212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298964 + ... + 305976.

It is an arithmetic number, because the mean of its divisors is an integer number (71016750).

Almost surely, 2^2121222110 is an apocalyptic number.

2121222110 is an abundant number, since it is smaller than the sum of its proper divisors (2423849890).

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

2121222110 is a wasteful number, since it uses less digits than its factorization.

2121222110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7205.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2121222110 is about 46056.7270873648. The cubic root of 2121222110 is about 1284.8784595387.

Adding to 2121222110 its reverse (112221212), we get a palindrome (2233443322).

The spelling of 2121222110 in words is "two billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred ten".