212121120103 has 2 divisors, whose sum is σ = 212121120104. Its totient is φ = 212121120102.

The previous prime is 212121120083. The next prime is 212121120119. The reversal of 212121120103 is 301021121212.

It is an a-pointer prime, because the next prime (212121120119) can be obtained adding 212121120103 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212121120103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212121120163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060560051 + 106060560052.

It is an arithmetic number, because the mean of its divisors is an integer number (106060560052).

Almost surely, 2^212121120103 is an apocalyptic number.

212121120103 is a deficient number, since it is larger than the sum of its proper divisors (1).

212121120103 is an equidigital number, since it uses as much as digits as its factorization.

212121120103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 212121120103 its reverse (301021121212), we get a palindrome (513142241315).

The spelling of 212121120103 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred twenty thousand, one hundred three".