83512121 has 24 divisors (see below), whose sum is σ = 108591840. Its totient is φ = 63470400.

The previous prime is 83512069. The next prime is 83512123. The reversal of 83512121 is 12121538.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-83512121 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83512123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20210 + ... + 23988.

It is an arithmetic number, because the mean of its divisors is an integer number (4524660).

Almost surely, 2^83512121 is an apocalyptic number.

It is an amenable number.

83512121 is a deficient number, since it is larger than the sum of its proper divisors (25079719).

83512121 is a wasteful number, since it uses less digits than its factorization.

83512121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3845 (or 3838 counting only the distinct ones).

The product of its digits is 480, while the sum is 23.

The square root of 83512121 is about 9138.4966487930. The cubic root of 83512121 is about 437.1023800677.

Adding to 83512121 its reverse (12121538), we get a palindrome (95633659).

The spelling of 83512121 in words is "eighty-three million, five hundred twelve thousand, one hundred twenty-one".