121211220223 has 2 divisors, whose sum is σ = 121211220224. Its totient is φ = 121211220222.

The previous prime is 121211220203. The next prime is 121211220227. The reversal of 121211220223 is 322022112121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121211220223 - 2¹⁷ = 121211089151 is a prime.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 121211220223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121211220227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605610111 + 60605610112.

It is an arithmetic number, because the mean of its divisors is an integer number (60605610112).

Almost surely, 2^121211220223 is an apocalyptic number.

121211220223 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211220223 is an equidigital number, since it uses as much as digits as its factorization.

121211220223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121211220223 its reverse (322022112121), we get a palindrome (443233332344).

The spelling of 121211220223 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty-three".