21220103104 has 28 divisors (see below), whose sum is σ = 42141779064. Its totient is φ = 10601702144.

The previous prime is 21220103077. The next prime is 21220103129. The reversal of 21220103104 is 40130102212.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48094 + ... + 211549.

It is an arithmetic number, because the mean of its divisors is an integer number (1505063538).

Almost surely, 2^21220103104 is an apocalyptic number.

It is an amenable number.

21220103104 is a deficient number, since it is larger than the sum of its proper divisors (20921675960).

21220103104 is a wasteful number, since it uses less digits than its factorization.

21220103104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260932 (or 260922 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21220103104 its reverse (40130102212), we get a palindrome (61350205316).

The spelling of 21220103104 in words is "twenty-one billion, two hundred twenty million, one hundred three thousand, one hundred four".