10112111022221 has 8 divisors (see below), whose sum is σ = 10890066664344. Its totient is φ = 9334169801280.

The previous prime is 10112111022199. The next prime is 10112111022269. The reversal of 10112111022221 is 12222011121101.

It can be written as a sum of positive squares in 4 ways, for example, as 1097495092996 + 9014615929225 = 1047614^2 + 3002435^2 .

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 10112111022221 - 2¹⁴ = 10112111005837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10112111022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10112111022271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2126486 + ... + 4974551.

It is an arithmetic number, because the mean of its divisors is an integer number (1361258333043).

Almost surely, 2^{10112111022221} is an apocalyptic number.

It is an amenable number.

10112111022221 is a deficient number, since it is larger than the sum of its proper divisors (777955642123).

10112111022221 is a wasteful number, since it uses less digits than its factorization.

10112111022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7210591.

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

Adding to 10112111022221 its reverse (12222011121101), we get a palindrome (22334122143322).

The spelling of 10112111022221 in words is "ten trillion, one hundred twelve billion, one hundred eleven million, twenty-two thousand, two hundred twenty-one".