21201034432103 has 16 divisors (see below), whose sum is σ = 21993948278400. Its totient is φ = 20421276145920.

The previous prime is 21201034432073. The next prime is 21201034432153. The reversal of 21201034432103 is 30123443010212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21201034432103 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 (21201034432153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87685325 + ... + 87926777.

It is an arithmetic number, because the mean of its divisors is an integer number (1374621767400).

Almost surely, 2^{21201034432103} is an apocalyptic number.

21201034432103 is a deficient number, since it is larger than the sum of its proper divisors (792913846297).

21201034432103 is a wasteful number, since it uses less digits than its factorization.

21201034432103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268682.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21201034432103 its reverse (30123443010212), we get a palindrome (51324477442315).

The spelling of 21201034432103 in words is "twenty-one trillion, two hundred one billion, thirty-four million, four hundred thirty-two thousand, one hundred three".