2121102231 has 16 divisors (see below), whose sum is σ = 2848326624. Its totient is φ = 1404002304.

The previous prime is 2121102227. The next prime is 2121102233. The reversal of 2121102231 is 1322011212.

It is not a de Polignac number, because 2121102231 - 2² = 2121102227 is a prime.

It is a super-2 number, since 2×2121102231² = 8998149348706354722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121102231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121102233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319215 + ... + 325791.

It is an arithmetic number, because the mean of its divisors is an integer number (178020414).

Almost surely, 2^2121102231 is an apocalyptic number.

2121102231 is a deficient number, since it is larger than the sum of its proper divisors (727224393).

2121102231 is a wasteful number, since it uses less digits than its factorization.

2121102231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7330.

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

The square root of 2121102231 is about 46055.4256412857. The cubic root of 2121102231 is about 1284.8542544911.

Adding to 2121102231 its reverse (1322011212), we get a palindrome (3443113443).

The spelling of 2121102231 in words is "two billion, one hundred twenty-one million, one hundred two thousand, two hundred thirty-one".