1331231123 has 2 divisors, whose sum is σ = 1331231124. Its totient is φ = 1331231122.

The previous prime is 1331231093. The next prime is 1331231131. The reversal of 1331231123 is 3211321331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1331231123 - 2⁶ = 1331231059 is a prime.

It is a super-2 number, since 2×1331231123² = 3544352605687682258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1331231095 and 1331231104.

It is not a weakly prime, because it can be changed into another prime (1331231423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665615561 + 665615562.

It is an arithmetic number, because the mean of its divisors is an integer number (665615562).

Almost surely, 2^1331231123 is an apocalyptic number.

1331231123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331231123 is an equidigital number, since it uses as much as digits as its factorization.

1331231123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 20.

The square root of 1331231123 is about 36486.0401112535. The cubic root of 1331231123 is about 1100.0636665629.

Adding to 1331231123 its reverse (3211321331), we get a palindrome (4542552454).

The spelling of 1331231123 in words is "one billion, three hundred thirty-one million, two hundred thirty-one thousand, one hundred twenty-three".