1113213031 has 16 divisors (see below), whose sum is σ = 1288284480. Its totient is φ = 942197760.

The previous prime is 1113213029. The next prime is 1113213071. The reversal of 1113213031 is 1303123111.

It is not a de Polignac number, because 1113213031 - 2¹ = 1113213029 is a prime.

It is a super-2 number, since 2×1113213031² = 2478486504776413922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1113212996 and 1113213014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113213071) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 344001 + ... + 347221.

It is an arithmetic number, because the mean of its divisors is an integer number (80517780).

Almost surely, 2^1113213031 is an apocalyptic number.

1113213031 is a deficient number, since it is larger than the sum of its proper divisors (175071449).

1113213031 is an equidigital number, since it uses as much as digits as its factorization.

1113213031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3834.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1113213031 is about 33364.8472347769. The cubic root of 1113213031 is about 1036.3968726251.

Adding to 1113213031 its reverse (1303123111), we get a palindrome (2416336142).

The spelling of 1113213031 in words is "one billion, one hundred thirteen million, two hundred thirteen thousand, thirty-one".