125212552005 has 16 divisors (see below), whose sum is σ = 200802772800. Its totient is φ = 66625797888.

The previous prime is 125212551979. The next prime is 125212552013. The reversal of 125212552005 is 500255212521.

It is not a de Polignac number, because 125212552005 - 2⁶ = 125212551941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9632655 + ... + 9645644.

It is an arithmetic number, because the mean of its divisors is an integer number (12550173300).

Almost surely, 2^125212552005 is an apocalyptic number.

125212552005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125212552005 is a deficient number, since it is larger than the sum of its proper divisors (75590220795).

125212552005 is a wasteful number, since it uses less digits than its factorization.

125212552005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19278740.

The product of its (nonzero) digits is 10000, while the sum is 30.

Adding to 125212552005 its reverse (500255212521), we get a palindrome (625467764526).

The spelling of 125212552005 in words is "one hundred twenty-five billion, two hundred twelve million, five hundred fifty-two thousand, five".