1231111230 has 16 divisors (see below), whose sum is σ = 2954667024. Its totient is φ = 328296320.

The previous prime is 1231111177. The next prime is 1231111307. The reversal of 1231111230 is 321111321.

It is a happy number.

It is a super-2 number, since 2×1231111230² = 3031269721264225800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20518491 + ... + 20518550.

It is an arithmetic number, because the mean of its divisors is an integer number (184666689).

Almost surely, 2^1231111230 is an apocalyptic number.

1231111230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231111230 is an abundant number, since it is smaller than the sum of its proper divisors (1723555794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231111230 is a wasteful number, since it uses less digits than its factorization.

1231111230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41037051.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1231111230 is about 35087.1946727008. The cubic root of 1231111230 is about 1071.7638331899.

Adding to 1231111230 its reverse (321111321), we get a palindrome (1552222551).

Subtracting from 1231111230 its reverse (321111321), we obtain a palindrome (909999909).

The spelling of 1231111230 in words is "one billion, two hundred thirty-one million, one hundred eleven thousand, two hundred thirty".