13120051055550 has 96 divisors (see below), whose sum is σ = 34454447131392. Its totient is φ = 3292613998080.

The previous prime is 13120051055543. The next prime is 13120051055561. The reversal of 13120051055550 is 5555015002131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32959807 + ... + 33355493.

It is an arithmetic number, because the mean of its divisors is an integer number (358900490952).

Almost surely, 2^{13120051055550} is an apocalyptic number.

13120051055550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13120051055550 is an abundant number, since it is smaller than the sum of its proper divisors (21334396075842).

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

13120051055550 is a wasteful number, since it uses less digits than its factorization.

13120051055550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408722 (or 408717 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 33.

Adding to 13120051055550 its reverse (5555015002131), we get a palindrome (18675066057681).

The spelling of 13120051055550 in words is "thirteen trillion, one hundred twenty billion, fifty-one million, fifty-five thousand, five hundred fifty".