21111111132103 has 8 divisors (see below), whose sum is σ = 21677362761600. Its totient is φ = 20551807375608.

The previous prime is 21111111132091. The next prime is 21111111132227. The reversal of 21111111132103 is 30123111111112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21111111132103 - 2²⁵ = 21111077577671 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 (21111111136103) 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, 1736962093 + ... + 1736974246.

It is an arithmetic number, because the mean of its divisors is an integer number (2709670345200).

Almost surely, 2^{21111111132103} is an apocalyptic number.

21111111132103 is a deficient number, since it is larger than the sum of its proper divisors (566251629497).

21111111132103 is a wasteful number, since it uses less digits than its factorization.

21111111132103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3473936501.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 21111111132103 its reverse (30123111111112), we get a palindrome (51234222243215).

The spelling of 21111111132103 in words is "twenty-one trillion, one hundred eleven billion, one hundred eleven million, one hundred thirty-two thousand, one hundred three".