12031220334 has 16 divisors (see below), whose sum is σ = 27499932288. Its totient is φ = 3437491512.

The previous prime is 12031220273. The next prime is 12031220347. The reversal of 12031220334 is 43302213021.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 12031220334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143228772 + ... + 143228855.

It is an arithmetic number, because the mean of its divisors is an integer number (1718745768).

Almost surely, 2^12031220334 is an apocalyptic number.

12031220334 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12031220334 is an abundant number, since it is smaller than the sum of its proper divisors (15468711954).

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

12031220334 is a wasteful number, since it uses less digits than its factorization.

12031220334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286457639.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 12031220334 its reverse (43302213021), we get a palindrome (55333433355).

The spelling of 12031220334 in words is "twelve billion, thirty-one million, two hundred twenty thousand, three hundred thirty-four".