21013311301 has 4 divisors (see below), whose sum is σ = 21309273504. Its totient is φ = 20717349100.

The previous prime is 21013311259. The next prime is 21013311311. The reversal of 21013311301 is 10311331012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21013311301 - 2⁹ = 21013310789 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 (21013311311) 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, 147980995 + ... + 147981136.

It is an arithmetic number, because the mean of its divisors is an integer number (5327318376).

Almost surely, 2^21013311301 is an apocalyptic number.

It is an amenable number.

21013311301 is a deficient number, since it is larger than the sum of its proper divisors (295962203).

21013311301 is an equidigital number, since it uses as much as digits as its factorization.

21013311301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295962202.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21013311301 its reverse (10311331012), we get a palindrome (31324642313).

The spelling of 21013311301 in words is "twenty-one billion, thirteen million, three hundred eleven thousand, three hundred one".