2101839534821 has 8 divisors (see below), whose sum is σ = 2266833592800. Its totient is φ = 1937318918832.

The previous prime is 2101839534799. The next prime is 2101839534881. The reversal of 2101839534821 is 1284359381012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101839534821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101839534881) 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, 118351271 + ... + 118369028.

It is an arithmetic number, because the mean of its divisors is an integer number (283354199100).

Almost surely, 2^{2101839534821} is an apocalyptic number.

It is an amenable number.

2101839534821 is a deficient number, since it is larger than the sum of its proper divisors (164994057979).

2101839534821 is a wasteful number, since it uses less digits than its factorization.

2101839534821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236720995.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 2101839534821 in words is "two trillion, one hundred one billion, eight hundred thirty-nine million, five hundred thirty-four thousand, eight hundred twenty-one".