671321020111 has 16 divisors (see below), whose sum is σ = 807641516800. Its totient is φ = 545107693248.

The previous prime is 671321020093. The next prime is 671321020127. The reversal of 671321020111 is 111020123176.

It is not a de Polignac number, because 671321020111 - 2²⁵ = 671287465679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671321023111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3110056 + ... + 3318898.

It is an arithmetic number, because the mean of its divisors is an integer number (50477594800).

Almost surely, 2^671321020111 is an apocalyptic number.

671321020111 is a deficient number, since it is larger than the sum of its proper divisors (136320496689).

671321020111 is a wasteful number, since it uses less digits than its factorization.

671321020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233038.

The product of its (nonzero) digits is 504, while the sum is 25.

Adding to 671321020111 its reverse (111020123176), we get a palindrome (782341143287).

The spelling of 671321020111 in words is "six hundred seventy-one billion, three hundred twenty-one million, twenty thousand, one hundred eleven".