21115206130 has 16 divisors (see below), whose sum is σ = 38027632320. Its totient is φ = 8441579952.

The previous prime is 21115206071. The next prime is 21115206169. The reversal of 21115206130 is 3160251112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543084 + ... + 580663.

It is an arithmetic number, because the mean of its divisors is an integer number (2376727020).

Almost surely, 2^21115206130 is an apocalyptic number.

21115206130 is a deficient number, since it is larger than the sum of its proper divisors (16912426190).

21115206130 is a wasteful number, since it uses less digits than its factorization.

21115206130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125633.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 21115206130 its reverse (3160251112), we get a palindrome (24275457242).

The spelling of 21115206130 in words is "twenty-one billion, one hundred fifteen million, two hundred six thousand, one hundred thirty".