111231213000 has 128 divisors (see below), whose sum is σ = 356421237120. Its totient is φ = 28859961600.

The previous prime is 111231212957. The next prime is 111231213007. The reversal of 111231213000 is 312132111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (111231213007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 390042 + ... + 612041.

It is an arithmetic number, because the mean of its divisors is an integer number (2784540915).

Almost surely, 2^111231213000 is an apocalyptic number.

111231213000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111231213000 is an abundant number, since it is smaller than the sum of its proper divisors (245190024120).

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

111231213000 is a wasteful number, since it uses less digits than its factorization.

111231213000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002144 (or 1002130 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 111231213000 its reverse (312132111), we get a palindrome (111543345111).

The spelling of 111231213000 in words is "one hundred eleven billion, two hundred thirty-one million, two hundred thirteen thousand".