2231131021 has 8 divisors (see below), whose sum is σ = 2587922240. Its totient is φ = 1883854368.

The previous prime is 2231130971. The next prime is 2231131027. The reversal of 2231131021 is 1201311322.

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 2231131021 - 2¹⁵ = 2231098253 is a prime.

It is a super-3 number, since 3×2231131021³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2231130986 and 2231131004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231131027) 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 7 ways as a sum of consecutive naturals, for example, 2378136 + ... + 2379073.

It is an arithmetic number, because the mean of its divisors is an integer number (323490280).

Almost surely, 2^2231131021 is an apocalyptic number.

It is an amenable number.

2231131021 is a deficient number, since it is larger than the sum of its proper divisors (356791219).

2231131021 is an equidigital number, since it uses as much as digits as its factorization.

2231131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4757283.

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

The square root of 2231131021 is about 47234.8496451508. The cubic root of 2231131021 is about 1306.6973936429.

Adding to 2231131021 its reverse (1201311322), we get a palindrome (3432442343).

The spelling of 2231131021 in words is "two billion, two hundred thirty-one million, one hundred thirty-one thousand, twenty-one".