135202031252321 has 8 divisors (see below), whose sum is σ = 147493864761600. Its totient is φ = 122910321036240.

The previous prime is 135202031252251. The next prime is 135202031252341. The reversal of 135202031252321 is 123252130202531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135202031252321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135202031252341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28522961 + ... + 32923598.

It is an arithmetic number, because the mean of its divisors is an integer number (18436733095200).

Almost surely, 2^{135202031252321} is an apocalyptic number.

135202031252321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

135202031252321 is a deficient number, since it is larger than the sum of its proper divisors (12291833509279).

135202031252321 is a wasteful number, since it uses less digits than its factorization.

135202031252321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61646599.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 135202031252321 its reverse (123252130202531), we get a palindrome (258454161454852).

The spelling of 135202031252321 in words is "one hundred thirty-five trillion, two hundred two billion, thirty-one million, two hundred fifty-two thousand, three hundred twenty-one".