222121222011121 has 8 divisors (see below), whose sum is σ = 222397527744000. Its totient is φ = 221844971113920.

The previous prime is 222121222011109. The next prime is 222121222011193. The reversal of 222121222011121 is 121110222121222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222121222011121 - 2⁷ = 222121222010993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222121222011092 and 222121222011101.

It is not an unprimeable number, because it can be changed into a prime (222121222111121) 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 7 ways as a sum of consecutive naturals, for example, 5599561 + ... + 21808198.

It is an arithmetic number, because the mean of its divisors is an integer number (27799690968000).

Almost surely, 2^{222121222011121} is an apocalyptic number.

It is an amenable number.

222121222011121 is a deficient number, since it is larger than the sum of its proper divisors (276305732879).

222121222011121 is an equidigital number, since it uses as much as digits as its factorization.

222121222011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27417839.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 222121222011121 its reverse (121110222121222), we get a palindrome (343231444132343).

The spelling of 222121222011121 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred twenty-two million, eleven thousand, one hundred twenty-one".