1011233231 has 4 divisors (see below), whose sum is σ = 1011392232. Its totient is φ = 1011074232.

The previous prime is 1011233177. The next prime is 1011233243. The reversal of 1011233231 is 1323321101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1323321101 = 19 ⋅69648479.

It is a cyclic number.

It is not a de Polignac number, because 1011233231 - 2¹⁰ = 1011232207 is a prime.

It is a super-2 number, since 2×1011233231² = 2045185294957398722, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001233231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69545 + ... + 82818.

It is an arithmetic number, because the mean of its divisors is an integer number (252848058).

Almost surely, 2^1011233231 is an apocalyptic number.

1011233231 is a deficient number, since it is larger than the sum of its proper divisors (159001).

1011233231 is an equidigital number, since it uses as much as digits as its factorization.

1011233231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159000.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1011233231 is about 31799.8935690043. The cubic root of 1011233231 is about 1003.7304765729.

Adding to 1011233231 its reverse (1323321101), we get a palindrome (2334554332).

The spelling of 1011233231 in words is "one billion, eleven million, two hundred thirty-three thousand, two hundred thirty-one".