1201331123 has 2 divisors, whose sum is σ = 1201331124. Its totient is φ = 1201331122.

The previous prime is 1201331083. The next prime is 1201331149. The reversal of 1201331123 is 3211331021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1201331123 - 2¹⁴ = 1201314739 is a prime.

It is a super-2 number, since 2×1201331123² = 2886392934176882258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1201331723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600665561 + 600665562.

It is an arithmetic number, because the mean of its divisors is an integer number (600665562).

Almost surely, 2^1201331123 is an apocalyptic number.

1201331123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201331123 is an equidigital number, since it uses as much as digits as its factorization.

1201331123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1201331123 is about 34660.2239317636. The cubic root of 1201331123 is about 1063.0513487808.

Adding to 1201331123 its reverse (3211331021), we get a palindrome (4412662144).

The spelling of 1201331123 in words is "one billion, two hundred one million, three hundred thirty-one thousand, one hundred twenty-three".