22120012100221 has 16 divisors (see below), whose sum is σ = 25298569031680. Its totient is φ = 18946095248880.

The previous prime is 22120012100183. The next prime is 22120012100267. The reversal of 22120012100221 is 12200121002122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22120012100221 - 2¹³ = 22120012092029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22120012100195 and 22120012100204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120012100321) 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, 287059120 + ... + 287136166.

It is an arithmetic number, because the mean of its divisors is an integer number (1581160564480).

Almost surely, 2^{22120012100221} is an apocalyptic number.

It is an amenable number.

22120012100221 is a deficient number, since it is larger than the sum of its proper divisors (3178556931459).

22120012100221 is a wasteful number, since it uses less digits than its factorization.

22120012100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106624.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22120012100221 its reverse (12200121002122), we get a palindrome (34320133102343).

The spelling of 22120012100221 in words is "twenty-two trillion, one hundred twenty billion, twelve million, one hundred thousand, two hundred twenty-one".