11161443012 has 12 divisors (see below), whose sum is σ = 26043367056. Its totient is φ = 3720481000.

The previous prime is 11161442993. The next prime is 11161443047. The reversal of 11161443012 is 21034416111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×11161443012² (a number of 21 digits) contains 22 as substring.

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, 465060114 + ... + 465060137.

It is an arithmetic number, because the mean of its divisors is an integer number (2170280588).

Almost surely, 2^11161443012 is an apocalyptic number.

11161443012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11161443012 is an abundant number, since it is smaller than the sum of its proper divisors (14881924044).

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

11161443012 is a wasteful number, since it uses less digits than its factorization.

11161443012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930120258 (or 930120256 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 11161443012 its reverse (21034416111), we get a palindrome (32195859123).

The spelling of 11161443012 in words is "eleven billion, one hundred sixty-one million, four hundred forty-three thousand, twelve".