1011243231 has 32 divisors (see below), whose sum is σ = 1584760320. Its totient is φ = 635988672.

The previous prime is 1011243223. The next prime is 1011243241. The reversal of 1011243231 is 1323421101.

It is not a de Polignac number, because 1011243231 - 2³ = 1011243223 is a prime.

It is a super-2 number, since 2×1011243231² = 2045225744486638722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011243241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34180 + ... + 56486.

It is an arithmetic number, because the mean of its divisors is an integer number (49523760).

Almost surely, 2^1011243231 is an apocalyptic number.

1011243231 is a deficient number, since it is larger than the sum of its proper divisors (573517089).

1011243231 is a wasteful number, since it uses less digits than its factorization.

1011243231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22412 (or 22406 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1011243231 is about 31800.0508018462. The cubic root of 1011243231 is about 1003.7337851639.

Adding to 1011243231 its reverse (1323421101), we get a palindrome (2334664332).

The spelling of 1011243231 in words is "one billion, eleven million, two hundred forty-three thousand, two hundred thirty-one".