220221110122121 has 2 divisors, whose sum is σ = 220221110122122. Its totient is φ = 220221110122120.

The previous prime is 220221110122081. The next prime is 220221110122193. The reversal of 220221110122121 is 121221011122022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143290476160000 + 76930633962121 = 11970400^2 + 8771011^2 .

It is a cyclic number.

It is not a de Polignac number, because 220221110122121 - 2⁴² = 215823063611017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220221110122093 and 220221110122102.

It is not a weakly prime, because it can be changed into another prime (220221110122021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110110555061060 + 110110555061061.

It is an arithmetic number, because the mean of its divisors is an integer number (110110555061061).

Almost surely, 2^{220221110122121} is an apocalyptic number.

It is an amenable number.

220221110122121 is a deficient number, since it is larger than the sum of its proper divisors (1).

220221110122121 is an equidigital number, since it uses as much as digits as its factorization.

220221110122121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 220221110122121 its reverse (121221011122022), we get a palindrome (341442121244143).

Subtracting from 220221110122121 its reverse (121221011122022), we obtain a palindrome (99000099000099).

The spelling of 220221110122121 in words is "two hundred twenty trillion, two hundred twenty-one billion, one hundred ten million, one hundred twenty-two thousand, one hundred twenty-one".