12520212155 has 16 divisors (see below), whose sum is σ = 16392305664. Its totient is φ = 9104381280.

The previous prime is 12520212151. The next prime is 12520212157. The reversal of 12520212155 is 55121202521.

It is a happy number.

It is not a de Polignac number, because 12520212155 - 2² = 12520212151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12520212151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 681014 + ... + 699156.

It is an arithmetic number, because the mean of its divisors is an integer number (1024519104).

Almost surely, 2^12520212155 is an apocalyptic number.

12520212155 is a deficient number, since it is larger than the sum of its proper divisors (3872093509).

12520212155 is a wasteful number, since it uses less digits than its factorization.

12520212155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30706.

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 12520212155 its reverse (55121202521), we get a palindrome (67641414676).

The spelling of 12520212155 in words is "twelve billion, five hundred twenty million, two hundred twelve thousand, one hundred fifty-five".