1201313331 has 24 divisors (see below), whose sum is σ = 1769695200. Its totient is φ = 785102976.

The previous prime is 1201313329. The next prime is 1201313339. The reversal of 1201313331 is 1333131021.

It is a happy number.

1201313331 is a `hidden beast` number, since 1 + 20 + 1 + 313 + 331 = 666.

It is not a de Polignac number, because 1201313331 - 2¹ = 1201313329 is a prime.

It is a super-2 number, since 2×1201313331² = 2886307438476631122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1201313339) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104245 + ... + 115193.

It is an arithmetic number, because the mean of its divisors is an integer number (73737300).

Almost surely, 2^1201313331 is an apocalyptic number.

1201313331 is a deficient number, since it is larger than the sum of its proper divisors (568381869).

1201313331 is a wasteful number, since it uses less digits than its factorization.

1201313331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11195 (or 11192 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1201313331 is about 34659.9672677283. The cubic root of 1201313331 is about 1063.0461007403.

Adding to 1201313331 its reverse (1333131021), we get a palindrome (2534444352).

The spelling of 1201313331 in words is "one billion, two hundred one million, three hundred thirteen thousand, three hundred thirty-one".