671321020125 has 128 divisors (see below), whose sum is σ = 1319601254400. Its totient is φ = 296738208000.

The previous prime is 671321020093. The next prime is 671321020127. The reversal of 671321020125 is 521020123176.

It is not a de Polignac number, because 671321020125 - 2⁵ = 671321020093 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 671321020092 and 671321020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671321020127) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9411846 + ... + 9482904.

It is an arithmetic number, because the mean of its divisors is an integer number (10309384800).

Almost surely, 2^671321020125 is an apocalyptic number.

It is an amenable number.

671321020125 is a deficient number, since it is larger than the sum of its proper divisors (648280234275).

671321020125 is a wasteful number, since it uses less digits than its factorization.

671321020125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71204 (or 71194 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 671321020125 in words is "six hundred seventy-one billion, three hundred twenty-one million, twenty thousand, one hundred twenty-five".