1302222121 has 2 divisors, whose sum is σ = 1302222122. Its totient is φ = 1302222120.

The previous prime is 1302222071. The next prime is 1302222149. The reversal of 1302222121 is 1212222031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 924464025 + 377758096 = 30405^2 + 19436^2 .

It is a cyclic number.

It is not a de Polignac number, because 1302222121 - 2¹⁵ = 1302189353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1302222095 and 1302222104.

It is not a weakly prime, because it can be changed into another prime (1302222161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651111060 + 651111061.

It is an arithmetic number, because the mean of its divisors is an integer number (651111061).

Almost surely, 2^1302222121 is an apocalyptic number.

It is an amenable number.

1302222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1302222121 is an equidigital number, since it uses as much as digits as its factorization.

1302222121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1302222121 is about 36086.3148714301. The cubic root of 1302222121 is about 1092.0143770442.

Adding to 1302222121 its reverse (1212222031), we get a palindrome (2514444152).

The spelling of 1302222121 in words is "one billion, three hundred two million, two hundred twenty-two thousand, one hundred twenty-one".