1200031123 has 2 divisors, whose sum is σ = 1200031124. Its totient is φ = 1200031122.

The previous prime is 1200031121. The next prime is 1200031169. The reversal of 1200031123 is 3211300021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1200031123 - 2¹ = 1200031121 is a prime.

It is a super-2 number, since 2×1200031123² = 2880149392337282258, which contains 22 as substring.

Together with 1200031121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1200031121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600015561 + 600015562.

It is an arithmetic number, because the mean of its divisors is an integer number (600015562).

Almost surely, 2^1200031123 is an apocalyptic number.

1200031123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200031123 is an equidigital number, since it uses as much as digits as its factorization.

1200031123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1200031123 is about 34641.4653702755. The cubic root of 1200031123 is about 1062.6677560817.

Adding to 1200031123 its reverse (3211300021), we get a palindrome (4411331144).

The spelling of 1200031123 in words is "one billion, two hundred million, thirty-one thousand, one hundred twenty-three".