1103011231212 has 144 divisors (see below), whose sum is σ = 3048956951040. Its totient is φ = 333442569600.

The previous prime is 1103011231207. The next prime is 1103011231241. The reversal of 1103011231212 is 2121321103011.

1103011231212 is a `hidden beast` number, since 110 + 301 + 1 + 231 + 21 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 463254262 + ... + 463256642.

It is an arithmetic number, because the mean of its divisors is an integer number (21173312160).

Almost surely, 2^{1103011231212} is an apocalyptic number.

1103011231212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1103011231212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1524478475520).

1103011231212 is an abundant number, since it is smaller than the sum of its proper divisors (1945945719828).

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

1103011231212 is a wasteful number, since it uses less digits than its factorization.

1103011231212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4724 (or 4719 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1103011231212 its reverse (2121321103011), we get a palindrome (3224332334223).

The spelling of 1103011231212 in words is "one trillion, one hundred three billion, eleven million, two hundred thirty-one thousand, two hundred twelve".