1201023143 has 4 divisors (see below), whose sum is σ = 1201418568. Its totient is φ = 1200627720.

The previous prime is 1201023133. The next prime is 1201023151. The reversal of 1201023143 is 3413201021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201023143 - 2¹⁶ = 1200957607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201023113) 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, 193121 + ... + 199242.

It is an arithmetic number, because the mean of its divisors is an integer number (300354642).

Almost surely, 2^1201023143 is an apocalyptic number.

1201023143 is a deficient number, since it is larger than the sum of its proper divisors (395425).

1201023143 is an equidigital number, since it uses as much as digits as its factorization.

1201023143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395424.

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

The square root of 1201023143 is about 34655.7808020538. The cubic root of 1201023143 is about 1062.9604977434.

Adding to 1201023143 its reverse (3413201021), we get a palindrome (4614224164).

It can be divided in two parts, 12010 and 23143, that added together give a palindrome (35153).

The spelling of 1201023143 in words is "one billion, two hundred one million, twenty-three thousand, one hundred forty-three".