231144344034021 has 24 divisors (see below), whose sum is σ = 364331013724704. Its totient is φ = 140047649494560.

The previous prime is 231144344033903. The next prime is 231144344034139. The reversal of 231144344034021 is 120430443441132.

231144344034021 is a `hidden beast` number, since 2 + 3 + 114 + 43 + 440 + 3 + 40 + 21 = 666.

231144344034021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231144344033903) and next prime (231144344034139).

It is not a de Polignac number, because 231144344034021 - 2¹⁸ = 231144343771877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231144344035021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331581211 + ... + 332277576.

It is an arithmetic number, because the mean of its divisors is an integer number (15180458905196).

Almost surely, 2^{231144344034021} is an apocalyptic number.

It is an amenable number.

231144344034021 is a deficient number, since it is larger than the sum of its proper divisors (133186669690683).

231144344034021 is a wasteful number, since it uses less digits than its factorization.

231144344034021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663862321 (or 663862318 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

Adding to 231144344034021 its reverse (120430443441132), we get a palindrome (351574787475153).

The spelling of 231144344034021 in words is "two hundred thirty-one trillion, one hundred forty-four billion, three hundred forty-four million, thirty-four thousand, twenty-one".