1353612121 has 2 divisors, whose sum is σ = 1353612122. Its totient is φ = 1353612120.

The previous prime is 1353612059. The next prime is 1353612157. The reversal of 1353612121 is 1212163531.

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., 1338096400 + 15515721 = 36580^2 + 3939^2 .

It is a cyclic number.

It is not a de Polignac number, because 1353612121 - 2¹⁹ = 1353087833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1353615121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 676806060 + 676806061.

It is an arithmetic number, because the mean of its divisors is an integer number (676806061).

Almost surely, 2^1353612121 is an apocalyptic number.

It is an amenable number.

1353612121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1353612121 is an equidigital number, since it uses as much as digits as its factorization.

1353612121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

The square root of 1353612121 is about 36791.4680462740. The cubic root of 1353612121 is about 1106.1942878686.

Adding to 1353612121 its reverse (1212163531), we get a palindrome (2565775652).

The spelling of 1353612121 in words is "one billion, three hundred fifty-three million, six hundred twelve thousand, one hundred twenty-one".