52135223121 has 24 divisors (see below), whose sum is σ = 77856090624. Its totient is φ = 33583524480.

The previous prime is 52135223117. The next prime is 52135223131. The reversal of 52135223121 is 12132253125.

52135223121 is a `hidden beast` number, since 5 + 2 + 13 + 522 + 3 + 121 = 666.

It is not a de Polignac number, because 52135223121 - 2² = 52135223117 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52135223131) 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, 36105 + ... + 324921.

It is an arithmetic number, because the mean of its divisors is an integer number (3244003776).

Almost surely, 2^52135223121 is an apocalyptic number.

It is an amenable number.

52135223121 is a deficient number, since it is larger than the sum of its proper divisors (25720867503).

52135223121 is a wasteful number, since it uses less digits than its factorization.

52135223121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289501 (or 289498 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

Adding to 52135223121 its reverse (12132253125), we get a palindrome (64267476246).

The spelling of 52135223121 in words is "fifty-two billion, one hundred thirty-five million, two hundred twenty-three thousand, one hundred twenty-one".