21131033313301 has 2 divisors, whose sum is σ = 21131033313302. Its totient is φ = 21131033313300.

The previous prime is 21131033313289. The next prime is 21131033313337. The reversal of 21131033313301 is 10331333013112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20054006548900 + 1077026764401 = 4478170^2 + 1037799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21131033313301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21131033313391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565516656650 + 10565516656651.

It is an arithmetic number, because the mean of its divisors is an integer number (10565516656651).

Almost surely, 2^{21131033313301} is an apocalyptic number.

It is an amenable number.

21131033313301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21131033313301 is an equidigital number, since it uses as much as digits as its factorization.

21131033313301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 21131033313301 its reverse (10331333013112), we get a palindrome (31462366326413).

The spelling of 21131033313301 in words is "twenty-one trillion, one hundred thirty-one billion, thirty-three million, three hundred thirteen thousand, three hundred one".