22112010001221 has 48 divisors (see below), whose sum is σ = 34424371699200. Its totient is φ = 12588286684512.

The previous prime is 22112010001201. The next prime is 22112010001229. The reversal of 22112010001221 is 12210001021122.

It is not a de Polignac number, because 22112010001221 - 2⁵ = 22112010001189 is a prime.

It is a super-3 number, since 3×22112010001221³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22112010001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112010001229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45522010 + ... + 46005188.

It is an arithmetic number, because the mean of its divisors is an integer number (717174410400).

Almost surely, 2^{22112010001221} is an apocalyptic number.

22112010001221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22112010001221 is a deficient number, since it is larger than the sum of its proper divisors (12312361697979).

22112010001221 is a wasteful number, since it uses less digits than its factorization.

22112010001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484358 (or 484351 counting only the distinct ones).

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

Adding to 22112010001221 its reverse (12210001021122), we get a palindrome (34322011022343).

The spelling of 22112010001221 in words is "twenty-two trillion, one hundred twelve billion, ten million, one thousand, two hundred twenty-one".