222120121221201 has 96 divisors (see below), whose sum is σ = 358171289948160. Its totient is φ = 119884522609152.

The previous prime is 222120121221181. The next prime is 222120121221209. The reversal of 222120121221201 is 102122121021222.

It is not a de Polignac number, because 222120121221201 - 2¹⁰ = 222120121220177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (222120121221209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1773790570 + ... + 1773915788.

It is an arithmetic number, because the mean of its divisors is an integer number (3730950936960).

Almost surely, 2^{222120121221201} is an apocalyptic number.

222120121221201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222120121221201 is a deficient number, since it is larger than the sum of its proper divisors (136051168726959).

222120121221201 is a wasteful number, since it uses less digits than its factorization.

222120121221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127471 (or 127442 counting only the distinct ones).

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

Adding to 222120121221201 its reverse (102122121021222), we get a palindrome (324242242242423).

The spelling of 222120121221201 in words is "two hundred twenty-two trillion, one hundred twenty billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred one".