2131221122 has 8 divisors (see below), whose sum is σ = 3197029500. Its totient is φ = 1065544624.

The previous prime is 2131221121. The next prime is 2131221161. The reversal of 2131221122 is 2211221312.

It can be written as a sum of positive squares in 2 ways, for example, as 2041142041 + 90079081 = 45179^2 + 9491^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 2131221122.

It is not an unprimeable number, because it can be changed into a prime (2131221121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37904 + ... + 75492.

Almost surely, 2^2131221122 is an apocalyptic number.

2131221122 is a deficient number, since it is larger than the sum of its proper divisors (1065808378).

2131221122 is a wasteful number, since it uses less digits than its factorization.

2131221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65940.

The product of its digits is 96, while the sum is 17.

The square root of 2131221122 is about 46165.1505142136. The cubic root of 2131221122 is about 1286.8941813423.

Adding to 2131221122 its reverse (2211221312), we get a palindrome (4342442434).

The spelling of 2131221122 in words is "two billion, one hundred thirty-one million, two hundred twenty-one thousand, one hundred twenty-two".