21221201103 has 8 divisors (see below), whose sum is σ = 28303124016. Its totient is φ = 14143372800.

The previous prime is 21221201087. The next prime is 21221201117. The reversal of 21221201103 is 30110212212.

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

It is not a de Polignac number, because 21221201103 - 2⁴ = 21221201087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221201503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1011538 + ... + 1032303.

It is an arithmetic number, because the mean of its divisors is an integer number (3537890502).

Almost surely, 2^21221201103 is an apocalyptic number.

21221201103 is a deficient number, since it is larger than the sum of its proper divisors (7081922913).

21221201103 is a wasteful number, since it uses less digits than its factorization.

21221201103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047305.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21221201103 its reverse (30110212212), we get a palindrome (51331413315).

The spelling of 21221201103 in words is "twenty-one billion, two hundred twenty-one million, two hundred one thousand, one hundred three".