1202221121 has 2 divisors, whose sum is σ = 1202221122. Its totient is φ = 1202221120.

The previous prime is 1202221099. The next prime is 1202221151. The reversal of 1202221121 is 1211222021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 815902096 + 386319025 = 28564^2 + 19655^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202221121 - 2²⁶ = 1135112257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1202221096 and 1202221105.

It is not a weakly prime, because it can be changed into another prime (1202221151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601110560 + 601110561.

It is an arithmetic number, because the mean of its divisors is an integer number (601110561).

Almost surely, 2^1202221121 is an apocalyptic number.

It is an amenable number.

1202221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202221121 is an equidigital number, since it uses as much as digits as its factorization.

1202221121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1202221121 is about 34673.0604504419. The cubic root of 1202221121 is about 1063.3138021021.

Adding to 1202221121 its reverse (1211222021), we get a palindrome (2413443142).

The spelling of 1202221121 in words is "one billion, two hundred two million, two hundred twenty-one thousand, one hundred twenty-one".