1311121032 has 32 divisors (see below), whose sum is σ = 3529942080. Its totient is φ = 403421760.

The previous prime is 1311121027. The next prime is 1311121043. The reversal of 1311121032 is 2301211131.

It is a happy number.

It is an unprimeable number.

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, 2100844 + ... + 2101467.

It is an arithmetic number, because the mean of its divisors is an integer number (110310690).

Almost surely, 2^1311121032 is an apocalyptic number.

1311121032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311121032 is an abundant number, since it is smaller than the sum of its proper divisors (2218821048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311121032 is a wasteful number, since it uses less digits than its factorization.

1311121032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4202333 (or 4202329 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1311121032 is about 36209.4052975190. The cubic root of 1311121032 is about 1094.4962082733.

Adding to 1311121032 its reverse (2301211131), we get a palindrome (3612332163).

Subtracting 1311121032 from its reverse (2301211131), we obtain a palindrome (990090099).

It can be divided in two parts, 13111 and 21032, that added together give a palindrome (34143).

The spelling of 1311121032 in words is "one billion, three hundred eleven million, one hundred twenty-one thousand, thirty-two".