22122021012 has 48 divisors (see below), whose sum is σ = 63529909632. Its totient is φ = 5834378880.

The previous prime is 22122020993. The next prime is 22122021013. The reversal of 22122021012 is 21012022122.

It is a junction number, because it is equal to n+sod(n) for n = 22122020982 and 22122021000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122021013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10128039 + ... + 10130222.

It is an arithmetic number, because the mean of its divisors is an integer number (1323539784).

Almost surely, 2^22122021012 is an apocalyptic number.

It is an amenable number.

22122021012 is an abundant number, since it is smaller than the sum of its proper divisors (41407888620).

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

22122021012 is a wasteful number, since it uses less digits than its factorization.

22122021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20258288 (or 20258286 counting only the distinct ones).

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

Adding to 22122021012 its reverse (21012022122), we get a palindrome (43134043134).

The spelling of 22122021012 in words is "twenty-two billion, one hundred twenty-two million, twenty-one thousand, twelve".