22001021220012 has 24 divisors (see below), whose sum is σ = 51643115682816. Its totient is φ = 7289759525328.

The previous prime is 22001021220011. The next prime is 22001021220103. The reversal of 22001021220012 is 21002212010022.

It is a junction number, because it is equal to n+sod(n) for n = 22001021219973 and 22001021220000.

It is not an unprimeable number, because it can be changed into a prime (22001021220011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5489274748 + ... + 5489278755.

It is an arithmetic number, because the mean of its divisors is an integer number (2151796486784).

Almost surely, 2^{22001021220012} is an apocalyptic number.

It is an amenable number.

22001021220012 is an abundant number, since it is smaller than the sum of its proper divisors (29642094462804).

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

22001021220012 is a wasteful number, since it uses less digits than its factorization.

22001021220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10978553677 (or 10978553675 counting only the distinct ones).

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

Adding to 22001021220012 its reverse (21002212010022), we get a palindrome (43003233230034).

The spelling of 22001021220012 in words is "twenty-two trillion, one billion, twenty-one million, two hundred twenty thousand, twelve".