22221221102121 has 16 divisors (see below), whose sum is σ = 30355978917888. Its totient is φ = 14452332320400.

The previous prime is 22221221102111. The next prime is 22221221102159. The reversal of 22221221102121 is 12120112212222.

It is not a de Polignac number, because 22221221102121 - 2¹⁰ = 22221221101097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22221221102111) 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 15 ways as a sum of consecutive naturals, for example, 253328035 + ... + 253415736.

It is an arithmetic number, because the mean of its divisors is an integer number (1897248682368).

Almost surely, 2^{22221221102121} is an apocalyptic number.

It is an amenable number.

22221221102121 is a deficient number, since it is larger than the sum of its proper divisors (8134757815767).

22221221102121 is a wasteful number, since it uses less digits than its factorization.

22221221102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506744132.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22221221102121 its reverse (12120112212222), we get a palindrome (34341333314343).

The spelling of 22221221102121 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred two thousand, one hundred twenty-one".