22121002002012 has 96 divisors (see below), whose sum is σ = 52222065649152. Its totient is φ = 7287574634496.

The previous prime is 22121002001983. The next prime is 22121002002019. The reversal of 22121002002012 is 21020020012122.

It is a junction number, because it is equal to n+sod(n) for n = 22121002001982 and 22121002002000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121002002019) 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, 1089855448 + ... + 1089875744.

It is an arithmetic number, because the mean of its divisors is an integer number (543979850512).

Almost surely, 2^{22121002002012} is an apocalyptic number.

It is an amenable number.

22121002002012 is an abundant number, since it is smaller than the sum of its proper divisors (30101063647140).

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

22121002002012 is a wasteful number, since it uses less digits than its factorization.

22121002002012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23547 (or 23545 counting only the distinct ones).

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

Adding to 22121002002012 its reverse (21020020012122), we get a palindrome (43141022014134).

The spelling of 22121002002012 in words is "twenty-two trillion, one hundred twenty-one billion, two million, two thousand, twelve".