11540213012 has 12 divisors (see below), whose sum is σ = 20198030580. Its totient is φ = 5769347136.

The previous prime is 11540213011. The next prime is 11540213033. The reversal of 11540213012 is 21031204511.

It can be written as a sum of positive squares in 2 ways, for example, as 4570300816 + 6969912196 = 67604^2 + 83486^2 .

It is a super-2 number, since 2×11540213012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11540213011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154937 + ... + 216992.

It is an arithmetic number, because the mean of its divisors is an integer number (1683169215).

Almost surely, 2^11540213012 is an apocalyptic number.

It is an amenable number.

11540213012 is a deficient number, since it is larger than the sum of its proper divisors (8657817568).

11540213012 is a wasteful number, since it uses less digits than its factorization.

11540213012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379690 (or 379688 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 11540213012 its reverse (21031204511), we get a palindrome (32571417523).

The spelling of 11540213012 in words is "eleven billion, five hundred forty million, two hundred thirteen thousand, twelve".