220202022121 has 2 divisors, whose sum is σ = 220202022122. Its totient is φ = 220202022120.

The previous prime is 220202022059. The next prime is 220202022127. The reversal of 220202022121 is 121220202022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163386532521 + 56815489600 = 404211^2 + 238360^2 .

It is a cyclic number.

It is not a de Polignac number, because 220202022121 - 2⁹ = 220202021609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220202022095 and 220202022104.

It is not a weakly prime, because it can be changed into another prime (220202022127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110101011060 + 110101011061.

It is an arithmetic number, because the mean of its divisors is an integer number (110101011061).

Almost surely, 2^220202022121 is an apocalyptic number.

It is an amenable number.

220202022121 is a deficient number, since it is larger than the sum of its proper divisors (1).

220202022121 is an equidigital number, since it uses as much as digits as its factorization.

220202022121 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 16.

Adding to 220202022121 its reverse (121220202022), we get a palindrome (341422224143).

It can be divided in two parts, 220202022 and 121, that multiplied together give a palindrome (26644444662).

The spelling of 220202022121 in words is "two hundred twenty billion, two hundred two million, twenty-two thousand, one hundred twenty-one".