1201321142 has 80 divisors (see below), whose sum is σ = 2238559200. Its totient is φ = 482461056.

The previous prime is 1201321127. The next prime is 1201321153. The reversal of 1201321142 is 2411231021.

It is a self number, because there is not a number n which added to its sum of digits gives 1201321142.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 8062484 + ... + 8062632.

It is an arithmetic number, because the mean of its divisors is an integer number (27981990).

Almost surely, 2^1201321142 is an apocalyptic number.

1201321142 is a deficient number, since it is larger than the sum of its proper divisors (1037238058).

1201321142 is an equidigital number, since it uses as much as digits as its factorization.

1201321142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1201321142 is about 34660.0799479747. The cubic root of 1201321142 is about 1063.0484047285.

Adding to 1201321142 its reverse (2411231021), we get a palindrome (3612552163).

The spelling of 1201321142 in words is "one billion, two hundred one million, three hundred twenty-one thousand, one hundred forty-two".