22120012231221 has 32 divisors (see below), whose sum is σ = 31042772398080. Its totient is φ = 13983562729664.

The previous prime is 22120012231201. The next prime is 22120012231223. The reversal of 22120012231221 is 12213221002122.

It is not a de Polignac number, because 22120012231221 - 2³⁵ = 22085652492853 is a prime.

It is a super-2 number, since 2×22120012231221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120012231223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1472020 + ... + 6812258.

It is an arithmetic number, because the mean of its divisors is an integer number (970086637440).

Almost surely, 2^{22120012231221} is an apocalyptic number.

It is an amenable number.

22120012231221 is a deficient number, since it is larger than the sum of its proper divisors (8922760166859).

22120012231221 is a wasteful number, since it uses less digits than its factorization.

22120012231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5340785.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 22120012231221 its reverse (12213221002122), we get a palindrome (34333233233343).

The spelling of 22120012231221 in words is "twenty-two trillion, one hundred twenty billion, twelve million, two hundred thirty-one thousand, two hundred twenty-one".