2821166237021 has 8 divisors (see below), whose sum is σ = 3077818821984. Its totient is φ = 2564544139920.

The previous prime is 2821166237003. The next prime is 2821166237027. The reversal of 2821166237021 is 1207326611282.

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 2821166237021 - 2¹⁸ = 2821165974877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2821166237021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2821166237027) 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, 7428266 + ... + 7798811.

It is an arithmetic number, because the mean of its divisors is an integer number (384727352748).

Almost surely, 2^{2821166237021} is an apocalyptic number.

It is an amenable number.

2821166237021 is a deficient number, since it is larger than the sum of its proper divisors (256652584963).

2821166237021 is a wasteful number, since it uses less digits than its factorization.

2821166237021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15243931.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 2821166237021 in words is "two trillion, eight hundred twenty-one billion, one hundred sixty-six million, two hundred thirty-seven thousand, twenty-one".