1201312771 has 8 divisors (see below), whose sum is σ = 1209587904. Its totient is φ = 1193049000.

The previous prime is 1201312757. The next prime is 1201312807. The reversal of 1201312771 is 1772131021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1201312771 - 2¹³ = 1201304579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201312171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367896 + ... + 371146.

It is an arithmetic number, because the mean of its divisors is an integer number (151198488).

Almost surely, 2^1201312771 is an apocalyptic number.

1201312771 is a deficient number, since it is larger than the sum of its proper divisors (8275133).

1201312771 is a wasteful number, since it uses less digits than its factorization.

1201312771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5681.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 1201312771 is about 34659.9591892431. The cubic root of 1201312771 is about 1063.0459355584.

Adding to 1201312771 its reverse (1772131021), we get a palindrome (2973443792).

The spelling of 1201312771 in words is "one billion, two hundred one million, three hundred twelve thousand, seven hundred seventy-one".