135550440002421 has 48 divisors (see below), whose sum is σ = 197114287129344. Its totient is φ = 89760619210752.

The previous prime is 135550440002401. The next prime is 135550440002431. The reversal of 135550440002421 is 124200044055531.

135550440002421 is a `hidden beast` number, since 1 + 3 + 5 + 5 + 5 + 0 + 4 + 400 + 0 + 242 + 1 = 666.

It is not a de Polignac number, because 135550440002421 - 2⁵ = 135550440002389 is a prime.

It is a super-2 number, since 2×135550440002421² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135550440002401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1087447126 + ... + 1087571768.

It is an arithmetic number, because the mean of its divisors is an integer number (4106547648528).

Almost surely, 2^{135550440002421} is an apocalyptic number.

It is an amenable number.

135550440002421 is a deficient number, since it is larger than the sum of its proper divisors (61563847126923).

135550440002421 is a wasteful number, since it uses less digits than its factorization.

135550440002421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126330 (or 126327 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

Adding to 135550440002421 its reverse (124200044055531), we get a palindrome (259750484057952).

The spelling of 135550440002421 in words is "one hundred thirty-five trillion, five hundred fifty billion, four hundred forty million, two thousand, four hundred twenty-one".