21301131001 has 4 divisors (see below), whose sum is σ = 21301509492. Its totient is φ = 21300752512.

The previous prime is 21301130999. The next prime is 21301131017. The reversal of 21301131001 is 10013110312.

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 16945790976 + 4355340025 = 130176^2 + 65995^2 .

It is a cyclic number.

It is not a de Polignac number, because 21301131001 - 2¹ = 21301130999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21301131031) 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, 86080 + ... + 223633.

It is an arithmetic number, because the mean of its divisors is an integer number (5325377373).

Almost surely, 2^21301131001 is an apocalyptic number.

It is an amenable number.

21301131001 is a deficient number, since it is larger than the sum of its proper divisors (378491).

21301131001 is an equidigital number, since it uses as much as digits as its factorization.

21301131001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378490.

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

Adding to 21301131001 its reverse (10013110312), we get a palindrome (31314241313).

The spelling of 21301131001 in words is "twenty-one billion, three hundred one million, one hundred thirty-one thousand, one".