1353342121 has 4 divisors (see below), whose sum is σ = 1378876932. Its totient is φ = 1327807312.

The previous prime is 1353342119. The next prime is 1353342131. The reversal of 1353342121 is 1212433531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1212433531 = 10487 ⋅115613.

It can be written as a sum of positive squares in 2 ways, for example, as 1133264896 + 220077225 = 33664^2 + 14835^2 .

It is a cyclic number.

It is not a de Polignac number, because 1353342121 - 2¹ = 1353342119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1353342131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12767326 + ... + 12767431.

It is an arithmetic number, because the mean of its divisors is an integer number (344719233).

Almost surely, 2^1353342121 is an apocalyptic number.

It is an amenable number.

1353342121 is a deficient number, since it is larger than the sum of its proper divisors (25534811).

1353342121 is an equidigital number, since it uses as much as digits as its factorization.

1353342121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25534810.

The product of its digits is 2160, while the sum is 25.

The square root of 1353342121 is about 36787.7985342967. The cubic root of 1353342121 is about 1106.1207334843.

Adding to 1353342121 its reverse (1212433531), we get a palindrome (2565775652).

The spelling of 1353342121 in words is "one billion, three hundred fifty-three million, three hundred forty-two thousand, one hundred twenty-one".