21113044132 has 6 divisors (see below), whose sum is σ = 36947827238. Its totient is φ = 10556522064.

The previous prime is 21113044129. The next prime is 21113044223. The reversal of 21113044132 is 23144031112.

It can be written as a sum of positive squares in only one way, i.e., 18112853056 + 3000191076 = 134584^2 + 54774^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2639130513 + ... + 2639130520.

Almost surely, 2^21113044132 is an apocalyptic number.

It is an amenable number.

21113044132 is a deficient number, since it is larger than the sum of its proper divisors (15834783106).

21113044132 is a wasteful number, since it uses less digits than its factorization.

21113044132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278261037 (or 5278261035 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21113044132 its reverse (23144031112), we get a palindrome (44257075244).

The spelling of 21113044132 in words is "twenty-one billion, one hundred thirteen million, forty-four thousand, one hundred thirty-two".