205121401010872 has 8 divisors (see below), whose sum is σ = 384602626895400. Its totient is φ = 102560700505432.

The previous prime is 205121401010861. The next prime is 205121401010951. The reversal of 205121401010872 is 278010104121502.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12820087563172 + ... + 12820087563187.

It is an arithmetic number, because the mean of its divisors is an integer number (48075328361925).

Almost surely, 2^{205121401010872} is an apocalyptic number.

It is an amenable number.

205121401010872 is a deficient number, since it is larger than the sum of its proper divisors (179481225884528).

205121401010872 is a wasteful number, since it uses less digits than its factorization.

205121401010872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25640175126365 (or 25640175126361 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 34.

The spelling of 205121401010872 in words is "two hundred five trillion, one hundred twenty-one billion, four hundred one million, ten thousand, eight hundred seventy-two".