55121200013 has 8 divisors (see below), whose sum is σ = 60134027616. Its totient is φ = 50108674000.

The previous prime is 55121200003. The next prime is 55121200049. The reversal of 55121200013 is 31000212155.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55121200013 - 2¹⁰ = 55121198989 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 (55121200003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493295 + ... + 594627.

It is an arithmetic number, because the mean of its divisors is an integer number (7516753452).

Almost surely, 2^55121200013 is an apocalyptic number.

It is an amenable number.

55121200013 is a deficient number, since it is larger than the sum of its proper divisors (5012827603).

55121200013 is a wasteful number, since it uses less digits than its factorization.

55121200013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150795.

The product of its (nonzero) digits is 300, while the sum is 20.

Adding to 55121200013 its reverse (31000212155), we get a palindrome (86121412168).

The spelling of 55121200013 in words is "fifty-five billion, one hundred twenty-one million, two hundred thousand, thirteen".