220001011121 has 2 divisors, whose sum is σ = 220001011122. Its totient is φ = 220001011120.

The previous prime is 220001011103. The next prime is 220001011151. The reversal of 220001011121 is 121110100022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196524642721 + 23476368400 = 443311^2 + 153220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220001011121 is a prime.

It is not a weakly prime, because it can be changed into another prime (220001011151) 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 as a sum of consecutive naturals, namely, 110000505560 + 110000505561.

It is an arithmetic number, because the mean of its divisors is an integer number (110000505561).

Almost surely, 2^220001011121 is an apocalyptic number.

It is an amenable number.

220001011121 is a deficient number, since it is larger than the sum of its proper divisors (1).

220001011121 is an equidigital number, since it uses as much as digits as its factorization.

220001011121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 220001011121 its reverse (121110100022), we get a palindrome (341111111143).

The spelling of 220001011121 in words is "two hundred twenty billion, one million, eleven thousand, one hundred twenty-one".