2131221103 has 8 divisors (see below), whose sum is σ = 2333365200. Its totient is φ = 1930476480.

The previous prime is 2131221061. The next prime is 2131221121. The reversal of 2131221103 is 3011221312.

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

It is a cyclic number.

It is not a de Polignac number, because 2131221103 - 2²¹ = 2129123951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131221173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346678 + ... + 352771.

It is an arithmetic number, because the mean of its divisors is an integer number (291670650).

Almost surely, 2^2131221103 is an apocalyptic number.

2131221103 is a deficient number, since it is larger than the sum of its proper divisors (202144097).

2131221103 is a wasteful number, since it uses less digits than its factorization.

2131221103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699737.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2131221103 is about 46165.1503084307. The cubic root of 2131221103 is about 1286.8941775180.

Adding to 2131221103 its reverse (3011221312), we get a palindrome (5142442415).

The spelling of 2131221103 in words is "two billion, one hundred thirty-one million, two hundred twenty-one thousand, one hundred three".