22121102000 has 80 divisors (see below), whose sum is σ = 53547596544. Its totient is φ = 8838720000.

The previous prime is 22121101987. The next prime is 22121102027. The reversal of 22121102000 is 20112122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1976420 + ... + 1987580.

Almost surely, 2^22121102000 is an apocalyptic number.

22121102000 is a gapful number since it is divisible by the number (20) 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 22121102000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26773798272).

22121102000 is an abundant number, since it is smaller than the sum of its proper divisors (31426494544).

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

22121102000 is a wasteful number, since it uses less digits than its factorization.

22121102000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12175 (or 12159 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22121102000 its reverse (20112122), we get a palindrome (22141214122).

The spelling of 22121102000 in words is "twenty-two billion, one hundred twenty-one million, one hundred two thousand".