11231213012 has 6 divisors (see below), whose sum is σ = 19654622778. Its totient is φ = 5615606504.

The previous prime is 11231213011. The next prime is 11231213017. The reversal of 11231213012 is 21031213211.

It can be written as a sum of positive squares in only one way, i.e., 9041347396 + 2189865616 = 95086^2 + 46796^2 .

It is a super-2 number, since 2×11231213012² (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 (11231213011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1403901623 + ... + 1403901630.

It is an arithmetic number, because the mean of its divisors is an integer number (3275770463).

Almost surely, 2^11231213012 is an apocalyptic number.

It is an amenable number.

11231213012 is a deficient number, since it is larger than the sum of its proper divisors (8423409766).

11231213012 is a wasteful number, since it uses less digits than its factorization.

11231213012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807803257 (or 2807803255 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11231213012 its reverse (21031213211), we get a palindrome (32262426223).

The spelling of 11231213012 in words is "eleven billion, two hundred thirty-one million, two hundred thirteen thousand, twelve".