121211121223 has 2 divisors, whose sum is σ = 121211121224. Its totient is φ = 121211121222.

The previous prime is 121211121203. The next prime is 121211121253. The reversal of 121211121223 is 322121112121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121211121223 - 2³³ = 112621186631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121211121223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121211121203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605560611 + 60605560612.

It is an arithmetic number, because the mean of its divisors is an integer number (60605560612).

Almost surely, 2^121211121223 is an apocalyptic number.

121211121223 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211121223 is an equidigital number, since it uses as much as digits as its factorization.

121211121223 is an evil number, because the sum of its binary digits is even.

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

Adding to 121211121223 its reverse (322121112121), we get a palindrome (443332233344).

The spelling of 121211121223 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twenty-three".