11123213031012 has 48 divisors (see below), whose sum is σ = 26006333173632. Its totient is φ = 3700289479680.

The previous prime is 11123213030981. The next prime is 11123213031053. The reversal of 11123213031012 is 21013031232111.

It is a self number, because there is not a number n which added to its sum of digits gives 11123213031012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19260337 + ... + 19829447.

It is an arithmetic number, because the mean of its divisors is an integer number (541798607784).

Almost surely, 2^{11123213031012} is an apocalyptic number.

11123213031012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11123213031012 is an abundant number, since it is smaller than the sum of its proper divisors (14883120142620).

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

11123213031012 is a wasteful number, since it uses less digits than its factorization.

11123213031012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572388 (or 572386 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 11123213031012 its reverse (21013031232111), we get a palindrome (32136244263123).

The spelling of 11123213031012 in words is "eleven trillion, one hundred twenty-three billion, two hundred thirteen million, thirty-one thousand, twelve".