2121132231 has 32 divisors (see below), whose sum is σ = 3219194880. Its totient is φ = 1379726208.

The previous prime is 2121132227. The next prime is 2121132269. The reversal of 2121132231 is 1322311212.

It is not a de Polignac number, because 2121132231 - 2² = 2121132227 is a prime.

It is a super-2 number, since 2×2121132231² = 8998403882774074722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121132731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 437935 + ... + 442751.

It is an arithmetic number, because the mean of its divisors is an integer number (100599840).

Almost surely, 2^2121132231 is an apocalyptic number.

2121132231 is a deficient number, since it is larger than the sum of its proper divisors (1098062649).

2121132231 is a wasteful number, since it uses less digits than its factorization.

2121132231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5220 (or 5214 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2121132231 is about 46055.7513346596. The cubic root of 2121132231 is about 1284.8603119464.

Adding to 2121132231 its reverse (1322311212), we get a palindrome (3443443443).

The spelling of 2121132231 in words is "two billion, one hundred twenty-one million, one hundred thirty-two thousand, two hundred thirty-one".