2112101331505 has 12 divisors (see below), whose sum is σ = 2785879112436. Its totient is φ = 1536073695200.

The previous prime is 2112101331469. The next prime is 2112101331559. The reversal of 2112101331505 is 5051331012112.

It can be written as a sum of positive squares in 2 ways, for example, as 709733796849 + 1402367534656 = 842457^2 + 1184216^2 .

It is not a de Polignac number, because 2112101331505 - 2⁷ = 2112101331377 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 2112101331505.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1745537686 + ... + 1745538895.

It is an arithmetic number, because the mean of its divisors is an integer number (232156592703).

Almost surely, 2^{2112101331505} is an apocalyptic number.

It is an amenable number.

2112101331505 is a deficient number, since it is larger than the sum of its proper divisors (673777780931).

2112101331505 is a wasteful number, since it uses less digits than its factorization.

2112101331505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491076608 (or 3491076597 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 2112101331505 its reverse (5051331012112), we get a palindrome (7163432343617).

The spelling of 2112101331505 in words is "two trillion, one hundred twelve billion, one hundred one million, three hundred thirty-one thousand, five hundred five".