23534561221201 has 4 divisors (see below), whose sum is σ = 23600117102400. Its totient is φ = 23469005340004.

The previous prime is 23534561221181. The next prime is 23534561221207. The reversal of 23534561221201 is 10212216543532.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23534561221201 - 2⁵ = 23534561221169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23534561221207) 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, 32777940061 + ... + 32777940778.

It is an arithmetic number, because the mean of its divisors is an integer number (5900029275600).

Almost surely, 2^{23534561221201} is an apocalyptic number.

It is an amenable number.

23534561221201 is a deficient number, since it is larger than the sum of its proper divisors (65555881199).

23534561221201 is an equidigital number, since it uses as much as digits as its factorization.

23534561221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65555881198.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 23534561221201 its reverse (10212216543532), we get a palindrome (33746777764733).

The spelling of 23534561221201 in words is "twenty-three trillion, five hundred thirty-four billion, five hundred sixty-one million, two hundred twenty-one thousand, two hundred one".