2921939397871 has 8 divisors (see below), whose sum is σ = 3147378856160. Its totient is φ = 2696596352352.

The previous prime is 2921939397851. The next prime is 2921939397913. The reversal of 2921939397871 is 1787939391292.

2921939397871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2921939397871 - 2¹⁹ = 2921938873583 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 2921939397871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2921939397841) 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, 24040236 + ... + 24161473.

It is an arithmetic number, because the mean of its divisors is an integer number (393422357020).

Almost surely, 2^{2921939397871} is an apocalyptic number.

2921939397871 is a deficient number, since it is larger than the sum of its proper divisors (225439458289).

2921939397871 is a wasteful number, since it uses less digits than its factorization.

2921939397871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48206385.

The product of its digits is 92588832, while the sum is 70.

The spelling of 2921939397871 in words is "two trillion, nine hundred twenty-one billion, nine hundred thirty-nine million, three hundred ninety-seven thousand, eight hundred seventy-one".