121001021003 has 2 divisors, whose sum is σ = 121001021004. Its totient is φ = 121001021002.

The previous prime is 121001020997. The next prime is 121001021051. The reversal of 121001021003 is 300120100121.

It is a weak prime.

It is an emirp because it is prime and its reverse (300120100121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121001021003 - 2⁶ = 121001020939 is a prime.

It is not a weakly prime, because it can be changed into another prime (121001021303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500510501 + 60500510502.

It is an arithmetic number, because the mean of its divisors is an integer number (60500510502).

Almost surely, 2^121001021003 is an apocalyptic number.

121001021003 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001021003 is an equidigital number, since it uses as much as digits as its factorization.

121001021003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 121001021003 its reverse (300120100121), we get a palindrome (421121121124).

The spelling of 121001021003 in words is "one hundred twenty-one billion, one million, twenty-one thousand, three".