1111222123231 has 6 divisors (see below), whose sum is σ = 1221425970296. Its totient is φ = 1010201930100.

The previous prime is 1111222123229. The next prime is 1111222123243. The reversal of 1111222123231 is 1323212221111.

It is a happy number.

It is not a de Polignac number, because 1111222123231 - 2¹ = 1111222123229 is a prime.

It is a super-2 number, since 2×1111222123231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111222123261) 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, 4591826835 + ... + 4591827076.

Almost surely, 2^{1111222123231} is an apocalyptic number.

1111222123231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1111222123231 is a deficient number, since it is larger than the sum of its proper divisors (110203847065).

1111222123231 is an equidigital number, since it uses as much as digits as its factorization.

1111222123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9183653933 (or 9183653922 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

Adding to 1111222123231 its reverse (1323212221111), we get a palindrome (2434434344342).

The spelling of 1111222123231 in words is "one trillion, one hundred eleven billion, two hundred twenty-two million, one hundred twenty-three thousand, two hundred thirty-one".