671012121 has 16 divisors (see below), whose sum is σ = 996730560. Its totient is φ = 398690880.

The previous prime is 671012107. The next prime is 671012123. The reversal of 671012121 is 121210176.

It is a happy number.

It is not a de Polignac number, because 671012121 - 2¹³ = 671003929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671012123) 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, 295515 + ... + 297776.

It is an arithmetic number, because the mean of its divisors is an integer number (62295660).

Almost surely, 2^671012121 is an apocalyptic number.

It is an amenable number.

671012121 is a deficient number, since it is larger than the sum of its proper divisors (325718439).

671012121 is a wasteful number, since it uses less digits than its factorization.

671012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593336.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 671012121 is about 25903.9016559282. The cubic root of 671012121 is about 875.4744076642.

Adding to 671012121 its reverse (121210176), we get a palindrome (792222297).

The spelling of 671012121 in words is "six hundred seventy-one million, twelve thousand, one hundred twenty-one".