2055520310021 has 4 divisors (see below), whose sum is σ = 2176433269452. Its totient is φ = 1934607350592.

The previous prime is 2055520309991. The next prime is 2055520310047. The reversal of 2055520310021 is 1200130255502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1584793960996 + 470726349025 = 1258886^2 + 686095^2 .

It is a cyclic number.

It is not a de Polignac number, because 2055520310021 - 2¹⁴ = 2055520293637 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 (2055520310621) 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, 60456479690 + ... + 60456479723.

It is an arithmetic number, because the mean of its divisors is an integer number (544108317363).

Almost surely, 2^{2055520310021} is an apocalyptic number.

It is an amenable number.

2055520310021 is a deficient number, since it is larger than the sum of its proper divisors (120912959431).

2055520310021 is a wasteful number, since it uses less digits than its factorization.

2055520310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120912959430.

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 2055520310021 its reverse (1200130255502), we get a palindrome (3255650565523).

The spelling of 2055520310021 in words is "two trillion, fifty-five billion, five hundred twenty million, three hundred ten thousand, twenty-one".