22021022121012 has 36 divisors (see below), whose sum is σ = 56607712237440. Its totient is φ = 7215928151952.

The previous prime is 22021022120971. The next prime is 22021022121017. The reversal of 22021022121012 is 21012122012022.

It is a happy number.

22021022121012 is a `hidden beast` number, since 2 + 20 + 210 + 221 + 210 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021022121017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5183854308 + ... + 5183858555.

It is an arithmetic number, because the mean of its divisors is an integer number (1572436451040).

Almost surely, 2^{22021022121012} is an apocalyptic number.

It is an amenable number.

22021022121012 is an abundant number, since it is smaller than the sum of its proper divisors (34586690116428).

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

22021022121012 is a wasteful number, since it uses less digits than its factorization.

22021022121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10367712932 (or 10367712927 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22021022121012 its reverse (21012122012022), we get a palindrome (43033144133034).

The spelling of 22021022121012 in words is "twenty-two trillion, twenty-one billion, twenty-two million, one hundred twenty-one thousand, twelve".