121211220203 has 2 divisors, whose sum is σ = 121211220204. Its totient is φ = 121211220202.

The previous prime is 121211220121. The next prime is 121211220223. The reversal of 121211220203 is 302022112121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121211220203 - 2¹² = 121211216107 is a prime.

It is a super-2 number, since 2×121211220203² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121211220223) 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, 60605610101 + 60605610102.

It is an arithmetic number, because the mean of its divisors is an integer number (60605610102).

Almost surely, 2^121211220203 is an apocalyptic number.

121211220203 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211220203 is an equidigital number, since it uses as much as digits as its factorization.

121211220203 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 17.

Adding to 121211220203 its reverse (302022112121), we get a palindrome (423233332324).

The spelling of 121211220203 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, two hundred three".