22101221010012 has 24 divisors (see below), whose sum is σ = 51707771774736. Its totient is φ = 7347322800768.

The previous prime is 22101221009993. The next prime is 22101221010013. The reversal of 22101221010012 is 21001012210122.

It is a junction number, because it is equal to n+sod(n) for n = 22101221009973 and 22101221010000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101221010013) 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, 2468853993 + ... + 2468862944.

It is an arithmetic number, because the mean of its divisors is an integer number (2154490490614).

Almost surely, 2^{22101221010012} is an apocalyptic number.

It is an amenable number.

22101221010012 is an abundant number, since it is smaller than the sum of its proper divisors (29606550764724).

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

22101221010012 is a wasteful number, since it uses less digits than its factorization.

22101221010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4937717317 (or 4937717315 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22101221010012 its reverse (21001012210122), we get a palindrome (43102233220134).

The spelling of 22101221010012 in words is "twenty-two trillion, one hundred one billion, two hundred twenty-one million, ten thousand, twelve".