2921010191921 has 16 divisors (see below), whose sum is σ = 3053404155648. Its totient is φ = 2789069976000.

The previous prime is 2921010191917. The next prime is 2921010191923. The reversal of 2921010191921 is 1291910101292.

It is not a de Polignac number, because 2921010191921 - 2² = 2921010191917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2921010191923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30667271 + ... + 30762371.

It is an arithmetic number, because the mean of its divisors is an integer number (190837759728).

Almost surely, 2^{2921010191921} is an apocalyptic number.

It is an amenable number.

2921010191921 is a deficient number, since it is larger than the sum of its proper divisors (132393963727).

2921010191921 is a wasteful number, since it uses less digits than its factorization.

2921010191921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97472.

The product of its (nonzero) digits is 5832, while the sum is 38.

The spelling of 2921010191921 in words is "two trillion, nine hundred twenty-one billion, ten million, one hundred ninety-one thousand, nine hundred twenty-one".