135301221251 has 16 divisors (see below), whose sum is σ = 156794692800. Its totient is φ = 114349874688.

The previous prime is 135301221241. The next prime is 135301221287. The reversal of 135301221251 is 152122103531.

It is not a de Polignac number, because 135301221251 - 2¹⁸ = 135300959107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135301221251.

It is not an unprimeable number, because it can be changed into a prime (135301221241) 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 in 15 ways as a sum of consecutive naturals, for example, 1765805 + ... + 1840833.

It is an arithmetic number, because the mean of its divisors is an integer number (9799668300).

Almost surely, 2^135301221251 is an apocalyptic number.

135301221251 is a deficient number, since it is larger than the sum of its proper divisors (21493471549).

135301221251 is an equidigital number, since it uses as much as digits as its factorization.

135301221251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78638.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 135301221251 its reverse (152122103531), we get a palindrome (287423324782).

The spelling of 135301221251 in words is "one hundred thirty-five billion, three hundred one million, two hundred twenty-one thousand, two hundred fifty-one".