2131221110 has 24 divisors (see below), whose sum is σ = 3919596480. Its totient is φ = 834341744.

The previous prime is 2131221061. The next prime is 2131221121. The reversal of 2131221110 is 111221312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26150 + ... + 70329.

It is an arithmetic number, because the mean of its divisors is an integer number (163316520).

Almost surely, 2^2131221110 is an apocalyptic number.

2131221110 is a deficient number, since it is larger than the sum of its proper divisors (1788375370).

2131221110 is an equidigital number, since it uses as much as digits as its factorization.

2131221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96580 (or 96533 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 2131221110 is about 46165.1503842455. The cubic root of 2131221110 is about 1286.8941789270.

Adding to 2131221110 its reverse (111221312), we get a palindrome (2242442422).

The spelling of 2131221110 in words is "two billion, one hundred thirty-one million, two hundred twenty-one thousand, one hundred ten".