21221032103 has 8 divisors (see below), whose sum is σ = 21442897008. Its totient is φ = 21000285504.

The previous prime is 21221032097. The next prime is 21221032111. The reversal of 21221032103 is 30123012212.

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 21221032103 - 2¹⁰ = 21221031079 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 (21221032193) 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, 241400 + ... + 317357.

It is an arithmetic number, because the mean of its divisors is an integer number (2680362126).

Almost surely, 2^21221032103 is an apocalyptic number.

21221032103 is a deficient number, since it is larger than the sum of its proper divisors (221864905).

21221032103 is a wasteful number, since it uses less digits than its factorization.

21221032103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559153.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21221032103 its reverse (30123012212), we get a palindrome (51344044315).

The spelling of 21221032103 in words is "twenty-one billion, two hundred twenty-one million, thirty-two thousand, one hundred three".