1113121031 has 8 divisors (see below), whose sum is σ = 1231417728. Its totient is φ = 997675000.

The previous prime is 1113121021. The next prime is 1113121033. The reversal of 1113121031 is 1301213111.

1113121031 = 2729² + 2730² + ... + 2870².

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1113121031 is a prime.

It is a super-2 number, since 2×1113121031² = 2478076859309005922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1113120997 and 1113121015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113121033) 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, 711845 + ... + 713406.

It is an arithmetic number, because the mean of its divisors is an integer number (153927216).

Almost surely, 2^1113121031 is an apocalyptic number.

1113121031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1113121031 is a deficient number, since it is larger than the sum of its proper divisors (118296697).

1113121031 is a wasteful number, since it uses less digits than its factorization.

1113121031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425333.

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

The square root of 1113121031 is about 33363.4685097338. The cubic root of 1113121031 is about 1036.3683212947.

Adding to 1113121031 its reverse (1301213111), we get a palindrome (2414334142).

The spelling of 1113121031 in words is "one billion, one hundred thirteen million, one hundred twenty-one thousand, thirty-one".