220000012121 has 2 divisors, whose sum is σ = 220000012122. Its totient is φ = 220000012120.

The previous prime is 220000012109. The next prime is 220000012129. The reversal of 220000012121 is 121210000022.

It is a happy number.

220000012121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172274803600 + 47725208521 = 415060^2 + 218461^2 .

It is a cyclic number.

It is not a de Polignac number, because 220000012121 - 2²² = 219995817817 is a prime.

It is not a weakly prime, because it can be changed into another prime (220000012129) 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 as a sum of consecutive naturals, namely, 110000006060 + 110000006061.

It is an arithmetic number, because the mean of its divisors is an integer number (110000006061).

Almost surely, 2^220000012121 is an apocalyptic number.

It is an amenable number.

220000012121 is a deficient number, since it is larger than the sum of its proper divisors (1).

220000012121 is an equidigital number, since it uses as much as digits as its factorization.

220000012121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 220000012121 its reverse (121210000022), we get a palindrome (341210012143).

The spelling of 220000012121 in words is "two hundred twenty billion, twelve thousand, one hundred twenty-one".