121242121003 has 2 divisors, whose sum is σ = 121242121004. Its totient is φ = 121242121002.

The previous prime is 121242121001. The next prime is 121242121009. The reversal of 121242121003 is 300121242121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121242121003 - 2¹ = 121242121001 is a prime.

Together with 121242121001, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121242121001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60621060501 + 60621060502.

It is an arithmetic number, because the mean of its divisors is an integer number (60621060502).

Almost surely, 2^121242121003 is an apocalyptic number.

121242121003 is a deficient number, since it is larger than the sum of its proper divisors (1).

121242121003 is an equidigital number, since it uses as much as digits as its factorization.

121242121003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121242121003 its reverse (300121242121), we get a palindrome (421363363124).

The spelling of 121242121003 in words is "one hundred twenty-one billion, two hundred forty-two million, one hundred twenty-one thousand, three".