21013011002 has 12 divisors (see below), whose sum is σ = 32949515130. Its totient is φ = 10049700408.

The previous prime is 21013010987. The next prime is 21013011037. The reversal of 21013011002 is 20011031012.

It can be written as a sum of positive squares in only one way, i.e., 12561702241 + 8451308761 = 112079^2 + 91931^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9929477 + ... + 9931592.

Almost surely, 2^21013011002 is an apocalyptic number.

21013011002 is a deficient number, since it is larger than the sum of its proper divisors (11936504128).

21013011002 is a wasteful number, since it uses less digits than its factorization.

21013011002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19861117 (or 19861094 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21013011002 its reverse (20011031012), we get a palindrome (41024042014).

It can be divided in two parts, 2101 and 3011002, that added together give a palindrome (3013103).

The spelling of 21013011002 in words is "twenty-one billion, thirteen million, eleven thousand, two".