2111520005441 has 12 divisors (see below), whose sum is σ = 2679554144880. Its totient is φ = 1645340263560.

The previous prime is 2111520005429. The next prime is 2111520005447. The reversal of 2111520005441 is 1445000251112.

It is a happy number.

It is not a de Polignac number, because 2111520005441 - 2³⁰ = 2110446263617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2111520005441.

It is not an unprimeable number, because it can be changed into a prime (2111520005447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1958737871 + ... + 1958738948.

It is an arithmetic number, because the mean of its divisors is an integer number (223296178740).

Almost surely, 2^{2111520005441} is an apocalyptic number.

It is an amenable number.

2111520005441 is a deficient number, since it is larger than the sum of its proper divisors (568034139439).

2111520005441 is a wasteful number, since it uses less digits than its factorization.

2111520005441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3917476844 (or 3917476837 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

Adding to 2111520005441 its reverse (1445000251112), we get a palindrome (3556520256553).

The spelling of 2111520005441 in words is "two trillion, one hundred eleven billion, five hundred twenty million, five thousand, four hundred forty-one".