222001221212121 has 48 divisors (see below), whose sum is σ = 332233627356288. Its totient is φ = 131051639577600.

The previous prime is 222001221212119. The next prime is 222001221212201. The reversal of 222001221212121 is 121212122100222.

It is not a de Polignac number, because 222001221212121 - 2¹ = 222001221212119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222001221212921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25491120 + ... + 33072641.

It is an arithmetic number, because the mean of its divisors is an integer number (6921533903256).

Almost surely, 2^{222001221212121} is an apocalyptic number.

It is an amenable number.

222001221212121 is a deficient number, since it is larger than the sum of its proper divisors (110232406144167).

222001221212121 is a wasteful number, since it uses less digits than its factorization.

222001221212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58563922 (or 58563885 counting only the distinct ones).

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

Adding to 222001221212121 its reverse (121212122100222), we get a palindrome (343213343312343).

It can be divided in two parts, 222001 and 221212121, that added together give a palindrome (221434122).

The spelling of 222001221212121 in words is "two hundred twenty-two trillion, one billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty-one".