1101111231 has 16 divisors (see below), whose sum is σ = 1644905088. Its totient is φ = 649303200.

The previous prime is 1101111217. The next prime is 1101111247. The reversal of 1101111231 is 1321111011.

It is not a de Polignac number, because 1101111231 - 2²⁶ = 1034002367 is a prime.

It is a super-2 number, since 2×1101111231² = 2424891886068670722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101111251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449685 + ... + 452126.

It is an arithmetic number, because the mean of its divisors is an integer number (102806568).

Almost surely, 2^1101111231 is an apocalyptic number.

1101111231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1101111231 is a deficient number, since it is larger than the sum of its proper divisors (543793857).

1101111231 is a wasteful number, since it uses less digits than its factorization.

1101111231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901862.

The product of its (nonzero) digits is 6, while the sum is 12.

The square root of 1101111231 is about 33182.9961124670. The cubic root of 1101111231 is about 1032.6276050353.

Adding to 1101111231 its reverse (1321111011), we get a palindrome (2422222242).

The spelling of 1101111231 in words is "one billion, one hundred one million, one hundred eleven thousand, two hundred thirty-one".