231121144404 has 36 divisors (see below), whose sum is σ = 584435356596. Its totient is φ = 77012364288.

The previous prime is 231121144391. The next prime is 231121144433. The reversal of 231121144404 is 404441121132.

231121144404 is a `hidden beast` number, since 2 + 3 + 1 + 1 + 211 + 4 + 440 + 4 = 666.

231121144404 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 111557336004 + 119563808400 = 334002^2 + 345780^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×231121144404² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1066899 + ... + 1265114.

It is an arithmetic number, because the mean of its divisors is an integer number (16234315461).

Almost surely, 2^231121144404 is an apocalyptic number.

It is an amenable number.

231121144404 is an abundant number, since it is smaller than the sum of its proper divisors (353314212192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231121144404 is a wasteful number, since it uses less digits than its factorization.

231121144404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334776 (or 2334771 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 231121144404 its reverse (404441121132), we get a palindrome (635562265536).

The spelling of 231121144404 in words is "two hundred thirty-one billion, one hundred twenty-one million, one hundred forty-four thousand, four hundred four".