21013115002 has 16 divisors (see below), whose sum is σ = 34612818624. Its totient is φ = 9488160000.

The previous prime is 21013114981. The next prime is 21013115003. The reversal of 21013115002 is 20051131012.

It is not an unprimeable number, because it can be changed into a prime (21013115003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3159399 + ... + 3166042.

It is an arithmetic number, because the mean of its divisors is an integer number (2163301164).

Almost surely, 2^21013115002 is an apocalyptic number.

21013115002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21013115002 is a deficient number, since it is larger than the sum of its proper divisors (13599703622).

21013115002 is a wasteful number, since it uses less digits than its factorization.

21013115002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6325605.

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 21013115002 its reverse (20051131012), we get a palindrome (41064246014).

The spelling of 21013115002 in words is "twenty-one billion, thirteen million, one hundred fifteen thousand, two".