1013111231 has 8 divisors (see below), whose sum is σ = 1105650000. Its totient is φ = 920645440.

The previous prime is 1013111227. The next prime is 1013111249. The reversal of 1013111231 is 1321113101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1013111231 - 2² = 1013111227 is a prime.

It is a super-2 number, since 2×1013111231² = 2052788732756670722, which 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 (1013111531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13145 + ... + 46893.

It is an arithmetic number, because the mean of its divisors is an integer number (138206250).

Almost surely, 2^1013111231 is an apocalyptic number.

1013111231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1013111231 is a deficient number, since it is larger than the sum of its proper divisors (92538769).

1013111231 is a wasteful number, since it uses less digits than its factorization.

1013111231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36489.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1013111231 is about 31829.4082728536. The cubic root of 1013111231 is about 1004.3514477706.

Adding to 1013111231 its reverse (1321113101), we get a palindrome (2334224332).

The spelling of 1013111231 in words is "one billion, thirteen million, one hundred eleven thousand, two hundred thirty-one".