12021031110 has 128 divisors (see below), whose sum is σ = 32328875520. Its totient is φ = 2835968000.

The previous prime is 12021031103. The next prime is 12021031147. The reversal of 12021031110 is 1113012021.

It is a Curzon number.

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 63 ways as a sum of consecutive naturals, for example, 1963414 + ... + 1969526.

It is an arithmetic number, because the mean of its divisors is an integer number (252569340).

Almost surely, 2^12021031110 is an apocalyptic number.

12021031110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12021031110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16164437760).

12021031110 is an abundant number, since it is smaller than the sum of its proper divisors (20307844410).

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

12021031110 is a wasteful number, since it uses less digits than its factorization.

12021031110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6294.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 12021031110 its reverse (1113012021), we get a palindrome (13134043131).

The spelling of 12021031110 in words is "twelve billion, twenty-one million, thirty-one thousand, one hundred ten".