21203112450301 has 4 divisors (see below), whose sum is σ = 21390750613692. Its totient is φ = 21015474286912.

The previous prime is 21203112450167. The next prime is 21203112450323. The reversal of 21203112450301 is 10305421130212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8336356925625 + 12866755524676 = 2887275^2 + 3587026^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21203112450301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203112450341) 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, 93819081526 + ... + 93819081751.

It is an arithmetic number, because the mean of its divisors is an integer number (5347687653423).

Almost surely, 2^{21203112450301} is an apocalyptic number.

It is an amenable number.

21203112450301 is a deficient number, since it is larger than the sum of its proper divisors (187638163391).

21203112450301 is a wasteful number, since it uses less digits than its factorization.

21203112450301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187638163390.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 21203112450301 its reverse (10305421130212), we get a palindrome (31508533580513).

The spelling of 21203112450301 in words is "twenty-one trillion, two hundred three billion, one hundred twelve million, four hundred fifty thousand, three hundred one".