22012000000 has 126 divisors (see below), whose sum is σ = 54931796864. Its totient is φ = 8803200000.

The previous prime is 22011999983. The next prime is 22012000037. The reversal of 22012000000 is 21022.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 3997249 + ... + 4002751.

Almost surely, 2^22012000000 is an apocalyptic number.

22012000000 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 22012000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27465898432).

22012000000 is an abundant number, since it is smaller than the sum of its proper divisors (32919796864).

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

22012000000 is an frugal number, since it uses more digits than its factorization.

22012000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5549 (or 5510 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

Adding to 22012000000 its reverse (21022), we get a palindrome (22012021022).

The spelling of 22012000000 in words is "twenty-two billion, twelve million", and thus it is an aban number and an uban number.