21113132106 has 16 divisors (see below), whose sum is σ = 46065015648. Its totient is φ = 6397918800.

The previous prime is 21113132093. The next prime is 21113132107. The reversal of 21113132106 is 60123131112.

It is not an unprimeable number, because it can be changed into a prime (21113132107) 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, 159947905 + ... + 159948036.

It is an arithmetic number, because the mean of its divisors is an integer number (2879063478).

Almost surely, 2^21113132106 is an apocalyptic number.

21113132106 is an abundant number, since it is smaller than the sum of its proper divisors (24951883542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21113132106 is a wasteful number, since it uses less digits than its factorization.

21113132106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319895957.

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

Adding to 21113132106 its reverse (60123131112), we get a palindrome (81236263218).

The spelling of 21113132106 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty-two thousand, one hundred six".