21002131020301 has 4 divisors (see below), whose sum is σ = 21346428250204. Its totient is φ = 20657833790400.

The previous prime is 21002131020281. The next prime is 21002131020313. The reversal of 21002131020301 is 10302013120012.

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 6372645848100 + 14629485172201 = 2524410^2 + 3824851^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002131020301 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 (21002131020341) 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, 172148614860 + ... + 172148614981.

It is an arithmetic number, because the mean of its divisors is an integer number (5336607062551).

Almost surely, 2^{21002131020301} is an apocalyptic number.

It is an amenable number.

21002131020301 is a deficient number, since it is larger than the sum of its proper divisors (344297229903).

21002131020301 is an equidigital number, since it uses as much as digits as its factorization.

21002131020301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344297229902.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21002131020301 its reverse (10302013120012), we get a palindrome (31304144140313).

The spelling of 21002131020301 in words is "twenty-one trillion, two billion, one hundred thirty-one million, twenty thousand, three hundred one".