20121212112103 has 2 divisors, whose sum is σ = 20121212112104. Its totient is φ = 20121212112102.

The previous prime is 20121212112101. The next prime is 20121212112161. The reversal of 20121212112103 is 30121121212102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20121212112103 - 2¹ = 20121212112101 is a prime.

Together with 20121212112101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121212112101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060606056051 + 10060606056052.

It is an arithmetic number, because the mean of its divisors is an integer number (10060606056052).

Almost surely, 2^{20121212112103} is an apocalyptic number.

20121212112103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121212112103 is an equidigital number, since it uses as much as digits as its factorization.

20121212112103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 20121212112103 its reverse (30121121212102), we get a palindrome (50242333324205).

Subtracting 20121212112103 from its reverse (30121121212102), we obtain a palindrome (9999909099999).

The spelling of 20121212112103 in words is "twenty trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, one hundred three".