21113112130 has 24 divisors (see below), whose sum is σ = 41772556476. Its totient is φ = 7677494880.

The previous prime is 21113112019. The next prime is 21113112143. The reversal of 21113112130 is 3121131112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20414408641 + 698703489 = 142879^2 + 26433^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8723217 + ... + 8725636.

Almost surely, 2^21113112130 is an apocalyptic number.

21113112130 is a deficient number, since it is larger than the sum of its proper divisors (20659444346).

21113112130 is a wasteful number, since it uses less digits than its factorization.

21113112130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17448882 (or 17448871 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21113112130 its reverse (3121131112), we get a palindrome (24234243242).

The spelling of 21113112130 in words is "twenty-one billion, one hundred thirteen million, one hundred twelve thousand, one hundred thirty".