231113561330721 has 16 divisors (see below), whose sum is σ = 313203737784960. Its totient is φ = 151549556862720.

The previous prime is 231113561330711. The next prime is 231113561330879. The reversal of 231113561330721 is 127033165311132.

It is not a de Polignac number, because 231113561330721 - 2¹³ = 231113561322529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231113561330721.

It is not an unprimeable number, because it can be changed into a prime (231113561330711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112049881 + ... + 114093833.

It is an arithmetic number, because the mean of its divisors is an integer number (19575233611560).

Almost surely, 2^{231113561330721} is an apocalyptic number.

It is an amenable number.

231113561330721 is a deficient number, since it is larger than the sum of its proper divisors (82090176454239).

231113561330721 is a wasteful number, since it uses less digits than its factorization.

231113561330721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661896.

The product of its (nonzero) digits is 68040, while the sum is 39.

The spelling of 231113561330721 in words is "two hundred thirty-one trillion, one hundred thirteen billion, five hundred sixty-one million, three hundred thirty thousand, seven hundred twenty-one".