21101313001 has 2 divisors, whose sum is σ = 21101313002. Its totient is φ = 21101313000.

The previous prime is 21101312989. The next prime is 21101313041. The reversal of 21101313001 is 10031310112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13618890000 + 7482423001 = 116700^2 + 86501^2 .

It is a cyclic number.

It is not a de Polignac number, because 21101313001 - 2⁹ = 21101312489 is a prime.

It is not a weakly prime, because it can be changed into another prime (21101313041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550656500 + 10550656501.

It is an arithmetic number, because the mean of its divisors is an integer number (10550656501).

Almost surely, 2^21101313001 is an apocalyptic number.

It is an amenable number.

21101313001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101313001 is an equidigital number, since it uses as much as digits as its factorization.

21101313001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 21101313001 its reverse (10031310112), we get a palindrome (31132623113).

The spelling of 21101313001 in words is "twenty-one billion, one hundred one million, three hundred thirteen thousand, one".