1011231123 has 8 divisors (see below), whose sum is σ = 1540923648. Its totient is φ = 577846344.

The previous prime is 1011231103. The next prime is 1011231157. The reversal of 1011231123 is 3211321101.

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 1011231123 - 2¹³ = 1011222931 is a prime.

It is a super-2 number, since 2×1011231123² = 2045176768247682258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1011231103) 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, 24076911 + ... + 24076952.

It is an arithmetic number, because the mean of its divisors is an integer number (192615456).

Almost surely, 2^1011231123 is an apocalyptic number.

1011231123 is a deficient number, since it is larger than the sum of its proper divisors (529692525).

1011231123 is an equidigital number, since it uses as much as digits as its factorization.

1011231123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48153873.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1011231123 is about 31799.8604242220. The cubic root of 1011231123 is about 1003.7297791191.

Adding to 1011231123 its reverse (3211321101), we get a palindrome (4222552224).

The spelling of 1011231123 in words is "one billion, eleven million, two hundred thirty-one thousand, one hundred twenty-three".