82521800292121 has 8 divisors (see below), whose sum is σ = 86222858027904. Its totient is φ = 78830172004320.

The previous prime is 82521800292101. The next prime is 82521800292131. The reversal of 82521800292121 is 12129200812528.

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 82521800292121 - 2¹¹ = 82521800290073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82521800292101) 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, 2357344101 + ... + 2357379106.

It is an arithmetic number, because the mean of its divisors is an integer number (10777857253488).

Almost surely, 2^{82521800292121} is an apocalyptic number.

It is an amenable number.

82521800292121 is a deficient number, since it is larger than the sum of its proper divisors (3701057735783).

82521800292121 is a wasteful number, since it uses less digits than its factorization.

82521800292121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4714723991.

The product of its (nonzero) digits is 92160, while the sum is 43.

The spelling of 82521800292121 in words is "eighty-two trillion, five hundred twenty-one billion, eight hundred million, two hundred ninety-two thousand, one hundred twenty-one".