22212021012 has 96 divisors (see below), whose sum is σ = 55100473344. Its totient is φ = 6949219200.

The previous prime is 22212020993. The next prime is 22212021019. The reversal of 22212021012 is 21012021222.

It is a junction number, because it is equal to n+sod(n) for n = 22212020982 and 22212021000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212021019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8265133 + ... + 8267819.

It is an arithmetic number, because the mean of its divisors is an integer number (573963264).

Almost surely, 2^22212021012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22212021012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27550236672).

22212021012 is an abundant number, since it is smaller than the sum of its proper divisors (32888452332).

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

22212021012 is a wasteful number, since it uses less digits than its factorization.

22212021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3269 (or 3267 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22212021012 its reverse (21012021222), we get a palindrome (43224042234).

The spelling of 22212021012 in words is "twenty-two billion, two hundred twelve million, twenty-one thousand, twelve".