55105145101211 has 4 divisors (see below), whose sum is σ = 55123805837352. Its totient is φ = 55086484365072.

The previous prime is 55105145101159. The next prime is 55105145101213. The reversal of 55105145101211 is 11210154150155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55105145101211 - 2¹⁸ = 55105144839067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55105145101213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9330363641 + ... + 9330369546.

It is an arithmetic number, because the mean of its divisors is an integer number (13780951459338).

Almost surely, 2^{55105145101211} is an apocalyptic number.

55105145101211 is a deficient number, since it is larger than the sum of its proper divisors (18660736141).

55105145101211 is a wasteful number, since it uses less digits than its factorization.

55105145101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18660736140.

The product of its (nonzero) digits is 5000, while the sum is 32.

Adding to 55105145101211 its reverse (11210154150155), we get a palindrome (66315299251366).

The spelling of 55105145101211 in words is "fifty-five trillion, one hundred five billion, one hundred forty-five million, one hundred one thousand, two hundred eleven".