10111221231 has 16 divisors (see below), whose sum is σ = 13590528000. Its totient is φ = 6686510688.

The previous prime is 10111221217. The next prime is 10111221247. The reversal of 10111221231 is 13212211101.

It is not a de Polignac number, because 10111221231 - 2⁹ = 10111220719 is a prime.

It is a super-2 number, since 2×10111221231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10111221231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111221271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264210 + ... + 300048.

It is an arithmetic number, because the mean of its divisors is an integer number (849408000).

Almost surely, 2^10111221231 is an apocalyptic number.

10111221231 is a deficient number, since it is larger than the sum of its proper divisors (3479306769).

10111221231 is a wasteful number, since it uses less digits than its factorization.

10111221231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36598.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 10111221231 its reverse (13212211101), we get a palindrome (23323432332).

The spelling of 10111221231 in words is "ten billion, one hundred eleven million, two hundred twenty-one thousand, two hundred thirty-one".