121221011210203 has 2 divisors, whose sum is σ = 121221011210204. Its totient is φ = 121221011210202.

The previous prime is 121221011210179. The next prime is 121221011210239. The reversal of 121221011210203 is 302012110122121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121221011210203 - 2⁴⁵ = 86036639121371 is a prime.

It is a super-2 number, since 2×121221011210203² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121221011210293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (37) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610505605101 + 60610505605102.

It is an arithmetic number, because the mean of its divisors is an integer number (60610505605102).

Almost surely, 2^{121221011210203} is an apocalyptic number.

121221011210203 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221011210203 is an equidigital number, since it uses as much as digits as its factorization.

121221011210203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 121221011210203 its reverse (302012110122121), we get a palindrome (423233121332324).

The spelling of 121221011210203 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, eleven million, two hundred ten thousand, two hundred three".