921216605071 has 64 divisors (see below), whose sum is σ = 1176124320000. Its totient is φ = 718202806272.

The previous prime is 921216605051. The next prime is 921216605119. The reversal of 921216605071 is 170506612129.

It is not a de Polignac number, because 921216605071 - 2⁹ = 921216604559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921216605021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32131975 + ... + 32160631.

It is an arithmetic number, because the mean of its divisors is an integer number (18376942500).

Almost surely, 2^921216605071 is an apocalyptic number.

921216605071 is a deficient number, since it is larger than the sum of its proper divisors (254907714929).

921216605071 is a wasteful number, since it uses less digits than its factorization.

921216605071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28881 (or 28867 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 921216605071 in words is "nine hundred twenty-one billion, two hundred sixteen million, six hundred five thousand, seventy-one".