213121213322103 has 16 divisors (see below), whose sum is σ = 315915242230240. Its totient is φ = 141999758759232.

The previous prime is 213121213322053. The next prime is 213121213322117. The reversal of 213121213322103 is 301223312121312.

213121213322103 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 21 + 213 + 322 + 103 = 666.

It is not a de Polignac number, because 213121213322103 - 2⁹ = 213121213321591 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213121213322803) 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, 2251344076 + ... + 2251438737.

It is an arithmetic number, because the mean of its divisors is an integer number (19744702639390).

Almost surely, 2^{213121213322103} is an apocalyptic number.

213121213322103 is a deficient number, since it is larger than the sum of its proper divisors (102794028908137).

213121213322103 is a wasteful number, since it uses less digits than its factorization.

213121213322103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4502784575 (or 4502784569 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 213121213322103 its reverse (301223312121312), we get a palindrome (514344525443415).

The spelling of 213121213322103 in words is "two hundred thirteen trillion, one hundred twenty-one billion, two hundred thirteen million, three hundred twenty-two thousand, one hundred three".