10011112231221 has 6 divisors (see below), whose sum is σ = 14460495445110. Its totient is φ = 6674074820808.

The previous prime is 10011112231177. The next prime is 10011112231229. The reversal of 10011112231221 is 12213221111001.

It is a happy number.

10011112231221 is a `hidden beast` number, since 100 + 1 + 1 + 112 + 231 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8732202300900 + 1278909930321 = 2955030^2 + 1130889^2 .

It is not a de Polignac number, because 10011112231221 - 2⁹ = 10011112230709 is a prime.

It is a super-2 number, since 2×10011112231221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10011112231194 and 10011112231203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011112231229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 556172901726 + ... + 556172901743.

It is an arithmetic number, because the mean of its divisors is an integer number (2410082574185).

Almost surely, 2^{10011112231221} is an apocalyptic number.

It is an amenable number.

10011112231221 is a deficient number, since it is larger than the sum of its proper divisors (4449383213889).

10011112231221 is a wasteful number, since it uses less digits than its factorization.

10011112231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112345803475 (or 1112345803472 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 10011112231221 its reverse (12213221111001), we get a palindrome (22224333342222).

The spelling of 10011112231221 in words is "ten trillion, eleven billion, one hundred twelve million, two hundred thirty-one thousand, two hundred twenty-one".