2123221110 has 32 divisors (see below), whose sum is σ = 5098485600. Its totient is φ = 565886208.

The previous prime is 2123221097. The next prime is 2123221123. The reversal of 2123221110 is 111223212.

It is an interprime number because it is at equal distance from previous prime (2123221097) and next prime (2123221123).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2123221110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40314 + ... + 76626.

It is an arithmetic number, because the mean of its divisors is an integer number (159327675).

Almost surely, 2^2123221110 is an apocalyptic number.

2123221110 is an abundant number, since it is smaller than the sum of its proper divisors (2975264490).

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

2123221110 is a wasteful number, since it uses less digits than its factorization.

2123221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38272.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2123221110 is about 46078.4234756355. The cubic root of 2123221110 is about 1285.2819479529.

Adding to 2123221110 its reverse (111223212), we get a palindrome (2234444322).

The spelling of 2123221110 in words is "two billion, one hundred twenty-three million, two hundred twenty-one thousand, one hundred ten".