1201002123 has 4 divisors (see below), whose sum is σ = 1601336168. Its totient is φ = 800668080.

The previous prime is 1201002107. The next prime is 1201002163. The reversal of 1201002123 is 3212001021.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1201002123 - 2⁴ = 1201002107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201002099 and 1201002108.

It is not an unprimeable number, because it can be changed into a prime (1201002163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200167018 + ... + 200167023.

It is an arithmetic number, because the mean of its divisors is an integer number (400334042).

Almost surely, 2^1201002123 is an apocalyptic number.

1201002123 is a deficient number, since it is larger than the sum of its proper divisors (400334045).

1201002123 is an equidigital number, since it uses as much as digits as its factorization.

1201002123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400334044.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1201002123 is about 34655.4775324190. The cubic root of 1201002123 is about 1062.9542964863.

Adding to 1201002123 its reverse (3212001021), we get a palindrome (4413003144).

The spelling of 1201002123 in words is "one billion, two hundred one million, two thousand, one hundred twenty-three".