12121030220 has 48 divisors (see below), whose sum is σ = 27995442048. Its totient is φ = 4380230400.

The previous prime is 12121030217. The next prime is 12121030223. The reversal of 12121030220 is 2203012121.

It is a happy number.

12121030220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12121030217) and next prime (12121030223).

It is a junction number, because it is equal to n+sod(n) for n = 12121030195 and 12121030204.

It is not an unprimeable number, because it can be changed into a prime (12121030223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483731 + ... + 508170.

It is an arithmetic number, because the mean of its divisors is an integer number (583238376).

Almost surely, 2^12121030220 is an apocalyptic number.

12121030220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121030220 is an abundant number, since it is smaller than the sum of its proper divisors (15874411828).

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

12121030220 is a wasteful number, since it uses less digits than its factorization.

12121030220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991970 (or 991968 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12121030220 its reverse (2203012121), we get a palindrome (14324042341).

The spelling of 12121030220 in words is "twelve billion, one hundred twenty-one million, thirty thousand, two hundred twenty".