2120542231 has 4 divisors (see below), whose sum is σ = 2122670152. Its totient is φ = 2118414312.

The previous prime is 2120542217. The next prime is 2120542271. The reversal of 2120542231 is 1322450212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2120542231 - 2²¹ = 2118445079 is a prime.

It is a super-2 number, since 2×2120542231² = 8993398706908914722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120542271) 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, 1062465 + ... + 1064458.

It is an arithmetic number, because the mean of its divisors is an integer number (530667538).

Almost surely, 2^2120542231 is an apocalyptic number.

2120542231 is a deficient number, since it is larger than the sum of its proper divisors (2127921).

2120542231 is an equidigital number, since it uses as much as digits as its factorization.

2120542231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127920.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2120542231 is about 46049.3456088140. The cubic root of 2120542231 is about 1284.7411715065.

Adding to 2120542231 its reverse (1322450212), we get a palindrome (3442992443).

It can be divided in two parts, 21205 and 42231, that added together give a palindrome (63436).

The spelling of 2120542231 in words is "two billion, one hundred twenty million, five hundred forty-two thousand, two hundred thirty-one".