22012100000 has 144 divisors (see below), whose sum is σ = 59094155232. Its totient is φ = 8004000000.

The previous prime is 22012099997. The next prime is 22012100023. The reversal of 22012100000 is 121022.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1089995 + ... + 1110005.

It is an arithmetic number, because the mean of its divisors is an integer number (410376078).

Almost surely, 2^22012100000 is an apocalyptic number.

22012100000 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 22012100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29547077616).

22012100000 is an abundant number, since it is smaller than the sum of its proper divisors (37082055232).

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

22012100000 is an equidigital number, since it uses as much as digits as its factorization.

22012100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20057 (or 20029 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 22012100000 its reverse (121022), we get a palindrome (22012221022).

The spelling of 22012100000 in words is "twenty-two billion, twelve million, one hundred thousand".