121212430103 has 2 divisors, whose sum is σ = 121212430104. Its totient is φ = 121212430102.

The previous prime is 121212430081. The next prime is 121212430109. The reversal of 121212430103 is 301034212121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121212430103 - 2⁸ = 121212429847 is a prime.

It is a super-2 number, since 2×121212430103² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121212430109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606215051 + 60606215052.

It is an arithmetic number, because the mean of its divisors is an integer number (60606215052).

Almost surely, 2^121212430103 is an apocalyptic number.

121212430103 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212430103 is an equidigital number, since it uses as much as digits as its factorization.

121212430103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 121212430103 its reverse (301034212121), we get a palindrome (422246642224).

The spelling of 121212430103 in words is "one hundred twenty-one billion, two hundred twelve million, four hundred thirty thousand, one hundred three".