21113134113 has 16 divisors (see below), whose sum is σ = 28692838656. Its totient is φ = 13804627200.

The previous prime is 21113134109. The next prime is 21113134121. The reversal of 21113134113 is 31143131112.

It is not a de Polignac number, because 21113134113 - 2² = 21113134109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21113134113.

It is not an unprimeable number, because it can be changed into a prime (21113134183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421656 + ... + 469062.

It is an arithmetic number, because the mean of its divisors is an integer number (1793302416).

Almost surely, 2^21113134113 is an apocalyptic number.

It is an amenable number.

21113134113 is a deficient number, since it is larger than the sum of its proper divisors (7579704543).

21113134113 is a wasteful number, since it uses less digits than its factorization.

21113134113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50264.

The product of its digits is 216, while the sum is 21.

Adding to 21113134113 its reverse (31143131112), we get a palindrome (52256265225).

The spelling of 21113134113 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty-four thousand, one hundred thirteen".