135421221363151 has 4 divisors (see below), whose sum is σ = 135444295354600. Its totient is φ = 135398147371704.

The previous prime is 135421221363143. The next prime is 135421221363199. The reversal of 135421221363151 is 151363122124531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135421221363151 - 2³ = 135421221363143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135421221363101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11536986921 + ... + 11536998658.

It is an arithmetic number, because the mean of its divisors is an integer number (33861073838650).

Almost surely, 2^{135421221363151} is an apocalyptic number.

135421221363151 is a deficient number, since it is larger than the sum of its proper divisors (23073991449).

135421221363151 is an equidigital number, since it uses as much as digits as its factorization.

135421221363151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23073991448.

The product of its digits is 129600, while the sum is 40.

Adding to 135421221363151 its reverse (151363122124531), we get a palindrome (286784343487682).

The spelling of 135421221363151 in words is "one hundred thirty-five trillion, four hundred twenty-one billion, two hundred twenty-one million, three hundred sixty-three thousand, one hundred fifty-one".