12220020121 has 8 divisors (see below), whose sum is σ = 13102629120. Its totient is φ = 11355609408.

The previous prime is 12220020103. The next prime is 12220020161. The reversal of 12220020121 is 12102002221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12220020121 - 2¹¹ = 12220018073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12220020161) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4548181 + ... + 4550866.

It is an arithmetic number, because the mean of its divisors is an integer number (1637828640).

Almost surely, 2^12220020121 is an apocalyptic number.

It is an amenable number.

12220020121 is a deficient number, since it is larger than the sum of its proper divisors (882608999).

12220020121 is an equidigital number, since it uses as much as digits as its factorization.

12220020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9099143.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12220020121 its reverse (12102002221), we get a palindrome (24322022342).

The spelling of 12220020121 in words is "twelve billion, two hundred twenty million, twenty thousand, one hundred twenty-one".