212121311120103 has 48 divisors (see below), whose sum is σ = 373987986632960. Its totient is φ = 104393263138560.

The previous prime is 212121311120099. The next prime is 212121311120113. The reversal of 212121311120103 is 301021113121212.

212121311120103 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212121311120103 - 2² = 212121311120099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 212121311120103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121311120113) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2196779650 + ... + 2196876207.

Almost surely, 2^{212121311120103} is an apocalyptic number.

212121311120103 is a deficient number, since it is larger than the sum of its proper divisors (161866675512857).

212121311120103 is a wasteful number, since it uses less digits than its factorization.

212121311120103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4393655908 (or 4393655897 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 212121311120103 its reverse (301021113121212), we get a palindrome (513142424241315).

The spelling of 212121311120103 in words is "two hundred twelve trillion, one hundred twenty-one billion, three hundred eleven million, one hundred twenty thousand, one hundred three".