112221210010121 has 4 divisors (see below), whose sum is σ = 112221244210452. Its totient is φ = 112221175809792.

The previous prime is 112221210010003. The next prime is 112221210010139. The reversal of 112221210010121 is 121010012122211.

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 55258929313225 + 56962280696896 = 7433635^2 + 7547336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112221210010121 is a prime.

It is a super-2 number, since 2×112221210010121² (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 112221210010121.

It is not an unprimeable number, because it can be changed into a prime (112221210010621) 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, 11585396 + ... + 18938421.

It is an arithmetic number, because the mean of its divisors is an integer number (28055311052613).

Almost surely, 2^{112221210010121} is an apocalyptic number.

It is an amenable number.

112221210010121 is a deficient number, since it is larger than the sum of its proper divisors (34200331).

112221210010121 is an equidigital number, since it uses as much as digits as its factorization.

112221210010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34200330.

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

Adding to 112221210010121 its reverse (121010012122211), we get a palindrome (233231222132332).

The spelling of 112221210010121 in words is "one hundred twelve trillion, two hundred twenty-one billion, two hundred ten million, ten thousand, one hundred twenty-one".