12550223021 has 32 divisors (see below), whose sum is σ = 15507007488. Its totient is φ = 9912637440.

The previous prime is 12550223017. The next prime is 12550223027. The reversal of 12550223021 is 12032205521.

12550223021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12550223021 - 2² = 12550223017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12550223027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1614881 + ... + 1622633.

It is an arithmetic number, because the mean of its divisors is an integer number (484593984).

Almost surely, 2^12550223021 is an apocalyptic number.

It is an amenable number.

12550223021 is a deficient number, since it is larger than the sum of its proper divisors (2956784467).

12550223021 is a wasteful number, since it uses less digits than its factorization.

12550223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8061.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 12550223021 its reverse (12032205521), we get a palindrome (24582428542).

The spelling of 12550223021 in words is "twelve billion, five hundred fifty million, two hundred twenty-three thousand, twenty-one".