2105556010001 has 4 divisors (see below), whose sum is σ = 2105579284404. Its totient is φ = 2105532735600.

The previous prime is 2105556009967. The next prime is 2105556010013. The reversal of 2105556010001 is 1000106555012.

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 836902950976 + 1268653059025 = 914824^2 + 1126345^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105556010001 - 2³⁰ = 2104482268177 is a prime.

It is a super-2 number, since 2×2105556010001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105556810001) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11500970 + ... + 11682611.

It is an arithmetic number, because the mean of its divisors is an integer number (526394821101).

Almost surely, 2^{2105556010001} is an apocalyptic number.

It is an amenable number.

2105556010001 is a deficient number, since it is larger than the sum of its proper divisors (23274403).

2105556010001 is an equidigital number, since it uses as much as digits as its factorization.

2105556010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23274402.

The product of its (nonzero) digits is 1500, while the sum is 26.

The spelling of 2105556010001 in words is "two trillion, one hundred five billion, five hundred fifty-six million, ten thousand, one".