21113134024 has 8 divisors (see below), whose sum is σ = 39587126310. Its totient is φ = 10556567008.

The previous prime is 21113133983. The next prime is 21113134033. The reversal of 21113134024 is 42043131112.

It can be written as a sum of positive squares in only one way, i.e., 16175261124 + 4937872900 = 127182^2 + 70270^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 21113133986 and 21113134004.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319570869 + ... + 1319570884.

Almost surely, 2^21113134024 is an apocalyptic number.

It is an amenable number.

21113134024 is a deficient number, since it is larger than the sum of its proper divisors (18473992286).

21113134024 is a wasteful number, since it uses less digits than its factorization.

21113134024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639141759 (or 2639141755 counting only the distinct ones).

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

Adding to 21113134024 its reverse (42043131112), we get a palindrome (63156265136).

The spelling of 21113134024 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty-four thousand, twenty-four".