12103213122221 has 16 divisors (see below), whose sum is σ = 13780155379200. Its totient is φ = 10537967170368.

The previous prime is 12103213122137. The next prime is 12103213122223. The reversal of 12103213122221 is 12222131230121.

12103213122221 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 12103213122221 - 2³⁴ = 12086033253037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12103213122223) 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, 106932221 + ... + 107045346.

It is an arithmetic number, because the mean of its divisors is an integer number (861259711200).

Almost surely, 2^{12103213122221} is an apocalyptic number.

It is an amenable number.

12103213122221 is a deficient number, since it is larger than the sum of its proper divisors (1676942256979).

12103213122221 is a wasteful number, since it uses less digits than its factorization.

12103213122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213977828.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 12103213122221 its reverse (12222131230121), we get a palindrome (24325344352342).

The spelling of 12103213122221 in words is "twelve trillion, one hundred three billion, two hundred thirteen million, one hundred twenty-two thousand, two hundred twenty-one".