12021221130 has 16 divisors (see below), whose sum is σ = 28850930784. Its totient is φ = 3205658960.

The previous prime is 12021221117. The next prime is 12021221171. The reversal of 12021221130 is 3112212021.

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

It is a Curzon 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, 200353656 + ... + 200353715.

It is an arithmetic number, because the mean of its divisors is an integer number (1803183174).

Almost surely, 2^12021221130 is an apocalyptic number.

12021221130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021221130 is an abundant number, since it is smaller than the sum of its proper divisors (16829709654).

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

12021221130 is a wasteful number, since it uses less digits than its factorization.

12021221130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400707381.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12021221130 its reverse (3112212021), we get a palindrome (15133433151).

The spelling of 12021221130 in words is "twelve billion, twenty-one million, two hundred twenty-one thousand, one hundred thirty".