21163523153201 has 8 divisors (see below), whose sum is σ = 24863439788544. Its totient is φ = 17759599848720.

The previous prime is 21163523153173. The next prime is 21163523153219. The reversal of 21163523153201 is 10235132536112.

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-21163523153201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21163523453201) 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, 73998332561 + ... + 73998332846.

It is an arithmetic number, because the mean of its divisors is an integer number (3107929973568).

Almost surely, 2^{21163523153201} is an apocalyptic number.

It is an amenable number.

21163523153201 is a deficient number, since it is larger than the sum of its proper divisors (3699916635343).

21163523153201 is a wasteful number, since it uses less digits than its factorization.

21163523153201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147996665431.

The product of its (nonzero) digits is 32400, while the sum is 35.

Adding to 21163523153201 its reverse (10235132536112), we get a palindrome (31398655689313).

The spelling of 21163523153201 in words is "twenty-one trillion, one hundred sixty-three billion, five hundred twenty-three million, one hundred fifty-three thousand, two hundred one".