8125212125218 has 4 divisors (see below), whose sum is σ = 12187818187830. Its totient is φ = 4062606062608.

The previous prime is 8125212125203. The next prime is 8125212125237.

8125212125218 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7865910172129 + 259301953089 = 2804623^2 + 509217^2 .

It is a super-2 number, since 2×8125212125218² (a number of 27 digits) contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2031303031303 + ... + 2031303031306.

Almost surely, 2^{8125212125218} is an apocalyptic number.

8125212125218 is a deficient number, since it is larger than the sum of its proper divisors (4062606062612).

8125212125218 is a wasteful number, since it uses less digits than its factorization.

8125212125218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062606062611.

The product of its digits is 51200, while the sum is 40.

The spelling of 8125212125218 in words is "eight trillion, one hundred twenty-five billion, two hundred twelve million, one hundred twenty-five thousand, two hundred eighteen".