1161331012 has 12 divisors (see below), whose sum is σ = 2060169916. Its totient is φ = 572711040.

The previous prime is 1161331001. The next prime is 1161331049. The reversal of 1161331012 is 2101331611.

It can be written as a sum of positive squares in 2 ways, for example, as 808492356 + 352838656 = 28434^2 + 18784^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1988289 + ... + 1988872.

Almost surely, 2^1161331012 is an apocalyptic number.

It is an amenable number.

1161331012 is a deficient number, since it is larger than the sum of its proper divisors (898838904).

1161331012 is a wasteful number, since it uses less digits than its factorization.

1161331012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977238 (or 3977236 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1161331012 is about 34078.3070588901. The cubic root of 1161331012 is about 1051.1192937926.

Adding to 1161331012 its reverse (2101331611), we get a palindrome (3262662623).

The spelling of 1161331012 in words is "one billion, one hundred sixty-one million, three hundred thirty-one thousand, twelve".