23151231421105 has 32 divisors (see below), whose sum is σ = 28041135271200. Its totient is φ = 18348462569472.

The previous prime is 23151231421051. The next prime is 23151231421169. The reversal of 23151231421105 is 50112413215132.

It can be written as a sum of positive squares in 16 ways, for example, as 3732473305521 + 19418758115584 = 1931961^2 + 4406672^2 .

It is a cyclic number.

It is not a de Polignac number, because 23151231421105 - 2¹³ = 23151231412913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 829987539 + ... + 830015431.

It is an arithmetic number, because the mean of its divisors is an integer number (876285477225).

Almost surely, 2^{23151231421105} is an apocalyptic number.

It is an amenable number.

23151231421105 is a deficient number, since it is larger than the sum of its proper divisors (4889903850095).

23151231421105 is a wasteful number, since it uses less digits than its factorization.

23151231421105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30453.

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 23151231421105 its reverse (50112413215132), we get a palindrome (73263644636237).

The spelling of 23151231421105 in words is "twenty-three trillion, one hundred fifty-one billion, two hundred thirty-one million, four hundred twenty-one thousand, one hundred five".