22121104104 has 128 divisors (see below), whose sum is σ = 67882752000. Its totient is φ = 6618456000.

The previous prime is 22121104099. The next prime is 22121104127. The reversal of 22121104104 is 40140112122.

22121104104 is a `hidden beast` number, since 221 + 21 + 10 + 410 + 4 = 666.

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 31 ways as a sum of consecutive naturals, for example, 128779 + ... + 246629.

It is an arithmetic number, because the mean of its divisors is an integer number (530334000).

Almost surely, 2^22121104104 is an apocalyptic number.

22121104104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22121104104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33941376000).

22121104104 is an abundant number, since it is smaller than the sum of its proper divisors (45761647896).

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

22121104104 is a wasteful number, since it uses less digits than its factorization.

22121104104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117956 (or 117946 counting only the distinct ones).

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

Adding to 22121104104 its reverse (40140112122), we get a palindrome (62261216226).

The spelling of 22121104104 in words is "twenty-two billion, one hundred twenty-one million, one hundred four thousand, one hundred four".