121021010203 has 2 divisors, whose sum is σ = 121021010204. Its totient is φ = 121021010202.

The previous prime is 121021010189. The next prime is 121021010233. The reversal of 121021010203 is 302010120121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121021010203 is a prime.

It is not a weakly prime, because it can be changed into another prime (121021010233) 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, 60510505101 + 60510505102.

It is an arithmetic number, because the mean of its divisors is an integer number (60510505102).

Almost surely, 2^121021010203 is an apocalyptic number.

121021010203 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021010203 is an equidigital number, since it uses as much as digits as its factorization.

121021010203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 121021010203 its reverse (302010120121), we get a palindrome (423031130324).

The spelling of 121021010203 in words is "one hundred twenty-one billion, twenty-one million, ten thousand, two hundred three".