2202121 has 2 divisors, whose sum is σ = 2202122. Its totient is φ = 2202120.

The previous prime is 2202077. The next prime is 2202131. The reversal of 2202121 is 1212022.

It is an a-pointer prime, because the next prime (2202131) can be obtained adding 2202121 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2134521 + 67600 = 1461^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 2202121 - 2¹³ = 2193929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2202098 and 2202107.

It is not a weakly prime, because it can be changed into another prime (2202131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1101060 + 1101061.

It is an arithmetic number, because the mean of its divisors is an integer number (1101061).

2^2202121 is an apocalyptic number.

It is an amenable number.

2202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2202121 is an equidigital number, since it uses as much as digits as its factorization.

2202121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2202121 is about 1483.9545141277. The cubic root of 2202121 is about 130.1009275402.

Adding to 2202121 its reverse (1212022), we get a palindrome (3414143).

Subtracting from 2202121 its reverse (1212022), we obtain a palindrome (990099).

The spelling of 2202121 in words is "two million, two hundred two thousand, one hundred twenty-one".