121221121003 has 2 divisors, whose sum is σ = 121221121004. Its totient is φ = 121221121002.

The previous prime is 121221121001. The next prime is 121221121013. The reversal of 121221121003 is 300121122121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121221121003 - 2¹ = 121221121001 is a prime.

Together with 121221121001, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121221121001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610560501 + 60610560502.

It is an arithmetic number, because the mean of its divisors is an integer number (60610560502).

Almost surely, 2^121221121003 is an apocalyptic number.

121221121003 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221121003 is an equidigital number, since it uses as much as digits as its factorization.

121221121003 is an odious number, because the sum of its binary digits is odd.

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

Adding to 121221121003 its reverse (300121122121), we get a palindrome (421342243124).

The spelling of 121221121003 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, three".