2101540311505 has 16 divisors (see below), whose sum is σ = 2553890469120. Its totient is φ = 1659872852352.

The previous prime is 2101540311499. The next prime is 2101540311527. The reversal of 2101540311505 is 5051130451012.

It is a cyclic number.

It is not a de Polignac number, because 2101540311505 - 2³⁷ = 1964101358033 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9168102 + ... + 9394528.

It is an arithmetic number, because the mean of its divisors is an integer number (159618154320).

Almost surely, 2^{2101540311505} is an apocalyptic number.

It is an amenable number.

2101540311505 is a deficient number, since it is larger than the sum of its proper divisors (452350157615).

2101540311505 is a wasteful number, since it uses less digits than its factorization.

2101540311505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250008.

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 2101540311505 its reverse (5051130451012), we get a palindrome (7152670762517).

The spelling of 2101540311505 in words is "two trillion, one hundred one billion, five hundred forty million, three hundred eleven thousand, five hundred five".