220351444121 has 2 divisors, whose sum is σ = 220351444122. Its totient is φ = 220351444120.

The previous prime is 220351444099. The next prime is 220351444123. The reversal of 220351444121 is 121444153022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114944731225 + 105406712896 = 339035^2 + 324664^2 .

It is a cyclic number.

It is not a de Polignac number, because 220351444121 - 2¹⁸ = 220351181977 is a prime.

It is a super-3 number, since 3×220351444121³ (a number of 35 digits) contains 333 as substring.

Together with 220351444123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220351444123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110175722060 + 110175722061.

It is an arithmetic number, because the mean of its divisors is an integer number (110175722061).

Almost surely, 2^220351444121 is an apocalyptic number.

It is an amenable number.

220351444121 is a deficient number, since it is larger than the sum of its proper divisors (1).

220351444121 is an equidigital number, since it uses as much as digits as its factorization.

220351444121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 220351444121 its reverse (121444153022), we get a palindrome (341795597143).

The spelling of 220351444121 in words is "two hundred twenty billion, three hundred fifty-one million, four hundred forty-four thousand, one hundred twenty-one".