21103120032 has 48 divisors (see below), whose sum is σ = 58311257760. Its totient is φ = 6664142592.

The previous prime is 21103120009. The next prime is 21103120033. The reversal of 21103120032 is 23002130112.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 21103119993 and 21103120020.

It is not an unprimeable number, because it can be changed into a prime (21103120033) 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, 5783023 + ... + 5786670.

It is an arithmetic number, because the mean of its divisors is an integer number (1214817870).

Almost surely, 2^21103120032 is an apocalyptic number.

It is an amenable number.

21103120032 is an abundant number, since it is smaller than the sum of its proper divisors (37208137728).

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

21103120032 is a wasteful number, since it uses less digits than its factorization.

21103120032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11569725 (or 11569717 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21103120032 its reverse (23002130112), we get a palindrome (44105250144).

The spelling of 21103120032 in words is "twenty-one billion, one hundred three million, one hundred twenty thousand, thirty-two".