21623522201201 has 8 divisors (see below), whose sum is σ = 22033402855200. Its totient is φ = 21217350874720.

The previous prime is 21623522201159. The next prime is 21623522201219. The reversal of 21623522201201 is 10210222532612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21623522201201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21623522201231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 927320111 + ... + 927343428.

It is an arithmetic number, because the mean of its divisors is an integer number (2754175356900).

Almost surely, 2^{21623522201201} is an apocalyptic number.

It is an amenable number.

21623522201201 is a deficient number, since it is larger than the sum of its proper divisors (409880653999).

21623522201201 is a wasteful number, since it uses less digits than its factorization.

21623522201201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854663759.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 21623522201201 its reverse (10210222532612), we get a palindrome (31833744733813).

The spelling of 21623522201201 in words is "twenty-one trillion, six hundred twenty-three billion, five hundred twenty-two million, two hundred one thousand, two hundred one".