23201221134337 has 4 divisors (see below), whose sum is σ = 23201379922500. Its totient is φ = 23201062346176.

The previous prime is 23201221134313. The next prime is 23201221134347. The reversal of 23201221134337 is 73343112210232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17501847957441 + 5699373176896 = 4183521^2 + 2387336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23201221134337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23201221134307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79174708 + ... + 79467205.

It is an arithmetic number, because the mean of its divisors is an integer number (5800344980625).

Almost surely, 2^{23201221134337} is an apocalyptic number.

It is an amenable number.

23201221134337 is a deficient number, since it is larger than the sum of its proper divisors (158788163).

23201221134337 is a wasteful number, since it uses less digits than its factorization.

23201221134337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158788162.

The product of its (nonzero) digits is 36288, while the sum is 34.

Adding to 23201221134337 its reverse (73343112210232), we get a palindrome (96544333344569).

The spelling of 23201221134337 in words is "twenty-three trillion, two hundred one billion, two hundred twenty-one million, one hundred thirty-four thousand, three hundred thirty-seven".