121211212103 has 2 divisors, whose sum is σ = 121211212104. Its totient is φ = 121211212102.

The previous prime is 121211212093. The next prime is 121211212289. The reversal of 121211212103 is 301212112121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121211212103 - 2²⁴ = 121194434887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121211112103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605606051 + 60605606052.

It is an arithmetic number, because the mean of its divisors is an integer number (60605606052).

Almost surely, 2^121211212103 is an apocalyptic number.

121211212103 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211212103 is an equidigital number, since it uses as much as digits as its factorization.

121211212103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121211212103 its reverse (301212112121), we get a palindrome (422423324224).

The spelling of 121211212103 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred twelve thousand, one hundred three".