135221420242260 has 72 divisors (see below), whose sum is σ = 447459972444576. Its totient is φ = 32780950361280.

The previous prime is 135221420242231. The next prime is 135221420242261. The reversal of 135221420242260 is 62242024122531.

135221420242260 is a `hidden beast` number, since 1 + 3 + 5 + 2 + 2 + 1 + 420 + 2 + 4 + 226 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135221420242261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34146821314 + ... + 34146825273.

It is an arithmetic number, because the mean of its divisors is an integer number (6214721839508).

Almost surely, 2^{135221420242260} is an apocalyptic number.

135221420242260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135221420242260 is an abundant number, since it is smaller than the sum of its proper divisors (312238552202316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135221420242260 is a wasteful number, since it uses less digits than its factorization.

135221420242260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68293646613 (or 68293646608 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

Adding to 135221420242260 its reverse (62242024122531), we get a palindrome (197463444364791).

The spelling of 135221420242260 in words is "one hundred thirty-five trillion, two hundred twenty-one billion, four hundred twenty million, two hundred forty-two thousand, two hundred sixty".