2105473917921 has 16 divisors (see below), whose sum is σ = 3063711928320. Its totient is φ = 1275542960720.

The previous prime is 2105473917913. The next prime is 2105473917959. The reversal of 2105473917921 is 1297193745012.

It is a cyclic number.

It is not a de Polignac number, because 2105473917921 - 2³ = 2105473917913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2105473918921) 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, 12460761 + ... + 12628598.

It is an arithmetic number, because the mean of its divisors is an integer number (191481995520).

Almost surely, 2^{2105473917921} is an apocalyptic number.

It is an amenable number.

2105473917921 is a deficient number, since it is larger than the sum of its proper divisors (958238010399).

2105473917921 is a wasteful number, since it uses less digits than its factorization.

2105473917921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25091916.

The product of its (nonzero) digits is 952560, while the sum is 51.

The spelling of 2105473917921 in words is "two trillion, one hundred five billion, four hundred seventy-three million, nine hundred seventeen thousand, nine hundred twenty-one".