22022121012 has 12 divisors (see below), whose sum is σ = 51384949056. Its totient is φ = 7340707000.

The previous prime is 22022120999. The next prime is 22022121071. The reversal of 22022121012 is 21012122022.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 22022120982 and 22022121000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 917588364 + ... + 917588387.

It is an arithmetic number, because the mean of its divisors is an integer number (4282079088).

Almost surely, 2^22022121012 is an apocalyptic number.

It is an amenable number.

22022121012 is an abundant number, since it is smaller than the sum of its proper divisors (29362828044).

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

22022121012 is a wasteful number, since it uses less digits than its factorization.

22022121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835176758 (or 1835176756 counting only the distinct ones).

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

Adding to 22022121012 its reverse (21012122022), we get a palindrome (43034243034).

The spelling of 22022121012 in words is "twenty-two billion, twenty-two million, one hundred twenty-one thousand, twelve".