21210112113 has 8 divisors (see below), whose sum is σ = 28667549088. Its totient is φ = 13946374944.

The previous prime is 21210112111. The next prime is 21210112123. The reversal of 21210112113 is 31121101212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21210112113 - 2¹ = 21210112111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21210112092 and 21210112101.

It is not an unprimeable number, because it can be changed into a prime (21210112111) 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, 48424695 + ... + 48425132.

It is an arithmetic number, because the mean of its divisors is an integer number (3583443636).

Almost surely, 2^21210112113 is an apocalyptic number.

It is an amenable number.

21210112113 is a deficient number, since it is larger than the sum of its proper divisors (7457436975).

21210112113 is an equidigital number, since it uses as much as digits as its factorization.

21210112113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96849903.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21210112113 its reverse (31121101212), we get a palindrome (52331213325).

The spelling of 21210112113 in words is "twenty-one billion, two hundred ten million, one hundred twelve thousand, one hundred thirteen".