21302201023 has 4 divisors (see below), whose sum is σ = 21365412640. Its totient is φ = 21238989408.

The previous prime is 21302201021. The next prime is 21302201047. The reversal of 21302201023 is 32010220312.

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

It is a cyclic number.

It is not a de Polignac number, because 21302201023 - 2¹ = 21302201021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21302200988 and 21302201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302201021) 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 3 ways as a sum of consecutive naturals, for example, 31605303 + ... + 31605976.

It is an arithmetic number, because the mean of its divisors is an integer number (5341353160).

Almost surely, 2^21302201023 is an apocalyptic number.

21302201023 is a deficient number, since it is larger than the sum of its proper divisors (63211617).

21302201023 is an equidigital number, since it uses as much as digits as its factorization.

21302201023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63211616.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21302201023 its reverse (32010220312), we get a palindrome (53312421335).

The spelling of 21302201023 in words is "twenty-one billion, three hundred two million, two hundred one thousand, twenty-three".