21102132103103 has 4 divisors (see below), whose sum is σ = 21102864514248. Its totient is φ = 21101399691960.

The previous prime is 21102132103099. The next prime is 21102132103133. The reversal of 21102132103103 is 30130123120112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21102132103103 - 2² = 21102132103099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102132103133) 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, 366162353 + ... + 366219978.

It is an arithmetic number, because the mean of its divisors is an integer number (5275716128562).

Almost surely, 2^{21102132103103} is an apocalyptic number.

21102132103103 is a deficient number, since it is larger than the sum of its proper divisors (732411145).

21102132103103 is an equidigital number, since it uses as much as digits as its factorization.

21102132103103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732411144.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21102132103103 its reverse (30130123120112), we get a palindrome (51232255223215).

The spelling of 21102132103103 in words is "twenty-one trillion, one hundred two billion, one hundred thirty-two million, one hundred three thousand, one hundred three".