222111120010121 has 4 divisors (see below), whose sum is σ = 222111462232644. Its totient is φ = 222110777787600.

The previous prime is 222111120010099. The next prime is 222111120010177. The reversal of 222111120010121 is 121010021111222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 177464067406096 + 44647052604025 = 13321564^2 + 6681845^2 .

It is a cyclic number.

It is not a de Polignac number, because 222111120010121 - 2⁴² = 217713073499017 is a prime.

It is a super-2 number, since 2×222111120010121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222111120010121.

It is not an unprimeable number, because it can be changed into a prime (222111120010921) 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 3 ways as a sum of consecutive naturals, for example, 170135870 + ... + 171436391.

It is an arithmetic number, because the mean of its divisors is an integer number (55527865558161).

Almost surely, 2^{222111120010121} is an apocalyptic number.

It is an amenable number.

222111120010121 is a deficient number, since it is larger than the sum of its proper divisors (342222523).

222111120010121 is an equidigital number, since it uses as much as digits as its factorization.

222111120010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342222522.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 222111120010121 its reverse (121010021111222), we get a palindrome (343121141121343).

The spelling of 222111120010121 in words is "two hundred twenty-two trillion, one hundred eleven billion, one hundred twenty million, ten thousand, one hundred twenty-one".