22012100111221 has 16 divisors (see below), whose sum is σ = 24416460085248. Its totient is φ = 19677738931200.

The previous prime is 22012100111203. The next prime is 22012100111249. The reversal of 22012100111221 is 12211100121022.

It is a cyclic number.

It is not a de Polignac number, because 22012100111221 - 2²⁹ = 22011563240309 is a prime.

It is a super-2 number, since 2×22012100111221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22012100111195 and 22012100111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012100111021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69562020 + ... + 69877741.

It is an arithmetic number, because the mean of its divisors is an integer number (1526028755328).

Almost surely, 2^{22012100111221} is an apocalyptic number.

It is an amenable number.

22012100111221 is a deficient number, since it is larger than the sum of its proper divisors (2404359974027).

22012100111221 is a wasteful number, since it uses less digits than its factorization.

22012100111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139440012.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 22012100111221 its reverse (12211100121022), we get a palindrome (34223200232243).

The spelling of 22012100111221 in words is "twenty-two trillion, twelve billion, one hundred million, one hundred eleven thousand, two hundred twenty-one".