2100593047981 has 4 divisors (see below), whose sum is σ = 2111255957052. Its totient is φ = 2089930138912.

The previous prime is 2100593047961. The next prime is 2100593048011. The reversal of 2100593047981 is 1897403950012.

It is a happy number.

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 1660062172356 + 440530875625 = 1288434^2 + 663725^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100593047981 - 2²³ = 2100584659373 is a prime.

It is a super-2 number, since 2×2100593047981² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100593047921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5331454240 + ... + 5331454633.

It is an arithmetic number, because the mean of its divisors is an integer number (527813989263).

Almost surely, 2^{2100593047981} is an apocalyptic number.

It is an amenable number.

2100593047981 is a deficient number, since it is larger than the sum of its proper divisors (10662909071).

2100593047981 is a wasteful number, since it uses less digits than its factorization.

2100593047981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10662909070.

The product of its (nonzero) digits is 544320, while the sum is 49.

Adding to 2100593047981 its reverse (1897403950012), we get a palindrome (3997996997993).

The spelling of 2100593047981 in words is "two trillion, one hundred billion, five hundred ninety-three million, forty-seven thousand, nine hundred eighty-one".