2202220121 has 2 divisors, whose sum is σ = 2202220122. Its totient is φ = 2202220120.

The previous prime is 2202220117. The next prime is 2202220133. The reversal of 2202220121 is 1210222022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1834922896 + 367297225 = 42836^2 + 19165^2 .

It is a cyclic number.

It is not a de Polignac number, because 2202220121 - 2² = 2202220117 is a prime.

It is a super-2 number, since 2×2202220121² = 9699546922674509282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2202220096 and 2202220105.

It is not a weakly prime, because it can be changed into another prime (2202220021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1101110060 + 1101110061.

It is an arithmetic number, because the mean of its divisors is an integer number (1101110061).

Almost surely, 2^2202220121 is an apocalyptic number.

It is an amenable number.

2202220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2202220121 is an equidigital number, since it uses as much as digits as its factorization.

2202220121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2202220121 is about 46927.8181998695. The cubic root of 2202220121 is about 1301.0287952809.

Adding to 2202220121 its reverse (1210222022), we get a palindrome (3412442143).

The spelling of 2202220121 in words is "two billion, two hundred two million, two hundred twenty thousand, one hundred twenty-one".