21014221104 has 60 divisors (see below), whose sum is σ = 58856292976. Its totient is φ = 6999302016.

The previous prime is 21014221091. The next prime is 21014221127. The reversal of 21014221104 is 40112241012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131634 + ... + 243630.

Almost surely, 2^21014221104 is an apocalyptic number.

21014221104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21014221104 is an abundant number, since it is smaller than the sum of its proper divisors (37842071872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21014221104 is a wasteful number, since it uses less digits than its factorization.

21014221104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113314 (or 113305 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21014221104 its reverse (40112241012), we get a palindrome (61126462116).

The spelling of 21014221104 in words is "twenty-one billion, fourteen million, two hundred twenty-one thousand, one hundred four".