2100442515541 has 8 divisors (see below), whose sum is σ = 2120437320120. Its totient is φ = 2080537981632.

The previous prime is 2100442515407. The next prime is 2100442515551. The reversal of 2100442515541 is 1455152440012.

It can be written as a sum of positive squares in 4 ways, for example, as 857005656516 + 1243436859025 = 925746^2 + 1115095^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2100442515541 - 2¹¹ = 2100442513493 is a prime.

It is a super-2 number, since 2×2100442515541² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100442515497 and 2100442515506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100442515551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22520910 + ... + 22613983.

It is an arithmetic number, because the mean of its divisors is an integer number (265054665015).

Almost surely, 2^{2100442515541} is an apocalyptic number.

It is an amenable number.

2100442515541 is a deficient number, since it is larger than the sum of its proper divisors (19994804579).

2100442515541 is a wasteful number, since it uses less digits than its factorization.

2100442515541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45135335.

The product of its (nonzero) digits is 32000, while the sum is 34.

Adding to 2100442515541 its reverse (1455152440012), we get a palindrome (3555594955553).

The spelling of 2100442515541 in words is "two trillion, one hundred billion, four hundred forty-two million, five hundred fifteen thousand, five hundred forty-one".