1000123131 has 8 divisors (see below), whose sum is σ = 1523997184. Its totient is φ = 571498920.

The previous prime is 1000123123. The next prime is 1000123133. The reversal of 1000123131 is 1313210001.

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

It is not a de Polignac number, because 1000123131 - 2³ = 1000123123 is a prime.

It is a super-2 number, since 2×1000123131² = 2000492554322486322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000123133) 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, 23812435 + ... + 23812476.

It is an arithmetic number, because the mean of its divisors is an integer number (190499648).

Almost surely, 2^1000123131 is an apocalyptic number.

1000123131 is a deficient number, since it is larger than the sum of its proper divisors (523874053).

1000123131 is an equidigital number, since it uses as much as digits as its factorization.

1000123131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47624921.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1000123131 is about 31624.7234138103. The cubic root of 1000123131 is about 1000.0410419822.

Adding to 1000123131 its reverse (1313210001), we get a palindrome (2313333132).

The spelling of 1000123131 in words is "one billion, one hundred twenty-three thousand, one hundred thirty-one".