2331123021 has 6 divisors (see below), whose sum is σ = 3367177710. Its totient is φ = 1554082008.

The previous prime is 2331123017. The next prime is 2331123043. The reversal of 2331123021 is 1203211332.

2331123021 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1224230121 + 1106892900 = 34989^2 + 33270^2 .

It is not a de Polignac number, because 2331123021 - 2² = 2331123017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2331122985 and 2331123003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2331121021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 129506826 + ... + 129506843.

It is an arithmetic number, because the mean of its divisors is an integer number (561196285).

Almost surely, 2^2331123021 is an apocalyptic number.

It is an amenable number.

2331123021 is a deficient number, since it is larger than the sum of its proper divisors (1036054689).

2331123021 is a wasteful number, since it uses less digits than its factorization.

2331123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259013675 (or 259013672 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2331123021 is about 48281.7048269839. The cubic root of 2331123021 is about 1325.9334627383.

Adding to 2331123021 its reverse (1203211332), we get a palindrome (3534334353).

The spelling of 2331123021 in words is "two billion, three hundred thirty-one million, one hundred twenty-three thousand, twenty-one".