1201011331 has 8 divisors (see below), whose sum is σ = 1335119744. Its totient is φ = 1072863360.

The previous prime is 1201011311. The next prime is 1201011349. The reversal of 1201011331 is 1331101021.

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 1201011331 - 2²⁹ = 664140419 is a prime.

It is a super-3 number, since 3×1201011331³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201011311) 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 7 ways as a sum of consecutive naturals, for example, 1489686 + ... + 1490491.

It is an arithmetic number, because the mean of its divisors is an integer number (166889968).

Almost surely, 2^1201011331 is an apocalyptic number.

1201011331 is a deficient number, since it is larger than the sum of its proper divisors (134108413).

1201011331 is a wasteful number, since it uses less digits than its factorization.

1201011331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980221.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1201011331 is about 34655.6103827360. The cubic root of 1201011331 is about 1062.9570130116.

Adding to 1201011331 its reverse (1331101021), we get a palindrome (2532112352).

The spelling of 1201011331 in words is "one billion, two hundred one million, eleven thousand, three hundred thirty-one".