1201322123 has 4 divisors (see below), whose sum is σ = 1202807880. Its totient is φ = 1199836368.

The previous prime is 1201322117. The next prime is 1201322147. The reversal of 1201322123 is 3212231021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201322123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201322173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 741665 + ... + 743282.

It is an arithmetic number, because the mean of its divisors is an integer number (300701970).

Almost surely, 2^1201322123 is an apocalyptic number.

1201322123 is a deficient number, since it is larger than the sum of its proper divisors (1485757).

1201322123 is an equidigital number, since it uses as much as digits as its factorization.

1201322123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485756.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1201322123 is about 34660.0940996992. The cubic root of 1201322123 is about 1063.0486940905.

Adding to 1201322123 its reverse (3212231021), we get a palindrome (4413553144).

The spelling of 1201322123 in words is "one billion, two hundred one million, three hundred twenty-two thousand, one hundred twenty-three".