1201310123 has 16 divisors (see below), whose sum is σ = 1341537120. Its totient is φ = 1068098304.

The previous prime is 1201310113. The next prime is 1201310147. The reversal of 1201310123 is 3210131021.

It is a de Polignac number, because none of the positive numbers 2^k-1201310123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201310098 and 1201310107.

It is not an unprimeable number, because it can be changed into a prime (1201310113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163415 + ... + 170607.

It is an arithmetic number, because the mean of its divisors is an integer number (83846070).

Almost surely, 2^1201310123 is an apocalyptic number.

1201310123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1201310123 is a deficient number, since it is larger than the sum of its proper divisors (140226997).

1201310123 is a wasteful number, since it uses less digits than its factorization.

1201310123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7678.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1201310123 is about 34659.9209895233. The cubic root of 1201310123 is about 1063.0451544829.

Adding to 1201310123 its reverse (3210131021), we get a palindrome (4411441144).

The spelling of 1201310123 in words is "one billion, two hundred one million, three hundred ten thousand, one hundred twenty-three".