1111121231 has 8 divisors (see below), whose sum is σ = 1212658128. Its totient is φ = 1009672000.

The previous prime is 1111121227. The next prime is 1111121239. The reversal of 1111121231 is 1321211111.

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 1111121231 - 2² = 1111121227 is a prime.

It is a super-2 number, since 2×1111121231² = 2469180779957910722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111121239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6161 + ... + 47541.

It is an arithmetic number, because the mean of its divisors is an integer number (151582266).

Almost surely, 2^1111121231 is an apocalyptic number.

1111121231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1111121231 is a deficient number, since it is larger than the sum of its proper divisors (101536897).

1111121231 is a wasteful number, since it uses less digits than its factorization.

1111121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43833.

The product of its digits is 12, while the sum is 14.

The square root of 1111121231 is about 33333.4851313210. The cubic root of 1111121231 is about 1035.7473131265.

Adding to 1111121231 its reverse (1321211111), we get a palindrome (2432332342).

The spelling of 1111121231 in words is "one billion, one hundred eleven million, one hundred twenty-one thousand, two hundred thirty-one".