11311231000 has 32 divisors (see below), whose sum is σ = 26468282880. Its totient is φ = 4524492000.

The previous prime is 11311230979. The next prime is 11311231033. The reversal of 11311231000 is 13211311.

It is a super-2 number, since 2×11311231000² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5654616 + ... + 5656615.

It is an arithmetic number, because the mean of its divisors is an integer number (827133840).

Almost surely, 2^11311231000 is an apocalyptic number.

11311231000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11311231000 is an abundant number, since it is smaller than the sum of its proper divisors (15157051880).

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

11311231000 is a wasteful number, since it uses less digits than its factorization.

11311231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11311252 (or 11311238 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 11311231000 its reverse (13211311), we get a palindrome (11324442311).

The spelling of 11311231000 in words is "eleven billion, three hundred eleven million, two hundred thirty-one thousand".