21300001011 has 24 divisors (see below), whose sum is σ = 31718475360. Its totient is φ = 13763627136.

The previous prime is 21300001007. The next prime is 21300001031. The reversal of 21300001011 is 11010000312.

It is not a de Polignac number, because 21300001011 - 2² = 21300001007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21300000984 and 21300001002.

It is not an unprimeable number, because it can be changed into a prime (21300001031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34026 + ... + 209183.

It is an arithmetic number, because the mean of its divisors is an integer number (1321603140).

Almost surely, 2^21300001011 is an apocalyptic number.

21300001011 is a deficient number, since it is larger than the sum of its proper divisors (10418474349).

21300001011 is a wasteful number, since it uses less digits than its factorization.

21300001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243515 (or 243512 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 21300001011 its reverse (11010000312), we get a palindrome (32310001323).

The spelling of 21300001011 in words is "twenty-one billion, three hundred million, one thousand, eleven".