1031000123 has 2 divisors, whose sum is σ = 1031000124. Its totient is φ = 1031000122.

The previous prime is 1031000107. The next prime is 1031000129. The reversal of 1031000123 is 3210001301.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1031000123 - 2⁴ = 1031000107 is a prime.

It is a super-2 number, since 2×1031000123² = 2125922507252030258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1031000129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515500061 + 515500062.

It is an arithmetic number, because the mean of its divisors is an integer number (515500062).

Almost surely, 2^1031000123 is an apocalyptic number.

1031000123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031000123 is an equidigital number, since it uses as much as digits as its factorization.

1031000123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1031000123 is about 32109.1906313442. The cubic root of 1031000123 is about 1010.2283975188.

Adding to 1031000123 its reverse (3210001301), we get a palindrome (4241001424).

The spelling of 1031000123 in words is "one billion, thirty-one million, one hundred twenty-three", and thus it is an aban number.