21321201103 has 8 divisors (see below), whose sum is σ = 21613335408. Its totient is φ = 21029906304.

The previous prime is 21321201061. The next prime is 21321201131. The reversal of 21321201103 is 30110212312.

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 21321201103 - 2¹³ = 21321192911 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 (21321201163) 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, 158650 + ... + 260407.

It is an arithmetic number, because the mean of its divisors is an integer number (2701666926).

Almost surely, 2^21321201103 is an apocalyptic number.

21321201103 is a deficient number, since it is larger than the sum of its proper divisors (292134305).

21321201103 is an equidigital number, since it uses as much as digits as its factorization.

21321201103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419753.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21321201103 its reverse (30110212312), we get a palindrome (51431413415).

The spelling of 21321201103 in words is "twenty-one billion, three hundred twenty-one million, two hundred one thousand, one hundred three".