21201200201023 has 8 divisors (see below), whose sum is σ = 21282047344800. Its totient is φ = 21120354832128.

The previous prime is 21201200201011. The next prime is 21201200201057. The reversal of 21201200201023 is 32010200210212.

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 not a de Polignac number, because 21201200201023 - 2²¹ = 21201198103871 is a prime.

It is a super-2 number, since 2×21201200201023² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21201200200988 and 21201200201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201200201003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26636043 + ... + 27420451.

It is an arithmetic number, because the mean of its divisors is an integer number (2660255918100).

Almost surely, 2^{21201200201023} is an apocalyptic number.

21201200201023 is a deficient number, since it is larger than the sum of its proper divisors (80847143777).

21201200201023 is a wasteful number, since it uses less digits than its factorization.

21201200201023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887441.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21201200201023 its reverse (32010200210212), we get a palindrome (53211400411235).

The spelling of 21201200201023 in words is "twenty-one trillion, two hundred one billion, two hundred million, two hundred one thousand, twenty-three".