21112032101 has 4 divisors (see below), whose sum is σ = 21115062432. Its totient is φ = 21109001772.

The previous prime is 21112032089. The next prime is 21112032173. The reversal of 21112032101 is 10123021112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21112032101 - 2³⁰ = 20038290277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112032901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1504691 + ... + 1518656.

It is an arithmetic number, because the mean of its divisors is an integer number (5278765608).

Almost surely, 2^21112032101 is an apocalyptic number.

It is an amenable number.

21112032101 is a deficient number, since it is larger than the sum of its proper divisors (3030331).

21112032101 is an equidigital number, since it uses as much as digits as its factorization.

21112032101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030330.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21112032101 its reverse (10123021112), we get a palindrome (31235053213).

The spelling of 21112032101 in words is "twenty-one billion, one hundred twelve million, thirty-two thousand, one hundred one".