121211302223 has 16 divisors (see below), whose sum is σ = 133999152000. Its totient is φ = 108727958880.

The previous prime is 121211302213. The next prime is 121211302229. The reversal of 121211302223 is 322203112121.

It is a cyclic number.

It is not a de Polignac number, because 121211302223 - 2²⁴ = 121194525007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121211302195 and 121211302204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211302229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6053 + ... + 492401.

It is an arithmetic number, because the mean of its divisors is an integer number (8374947000).

Almost surely, 2^121211302223 is an apocalyptic number.

121211302223 is a deficient number, since it is larger than the sum of its proper divisors (12787849777).

121211302223 is a wasteful number, since it uses less digits than its factorization.

121211302223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486662.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 121211302223 its reverse (322203112121), we get a palindrome (443414414344).

The spelling of 121211302223 in words is "one hundred twenty-one billion, two hundred eleven million, three hundred two thousand, two hundred twenty-three".