121223102121 has 64 divisors (see below), whose sum is σ = 207561139200. Its totient is φ = 69106694400.

The previous prime is 121223102089. The next prime is 121223102171. The reversal of 121223102121 is 121201322121.

121223102121 is a `hidden beast` number, since 121 + 22 + 310 + 212 + 1 = 666.

It is not a de Polignac number, because 121223102121 - 2⁵ = 121223102089 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121223102094 and 121223102103.

It is not an unprimeable number, because it can be changed into a prime (121223102171) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10147570 + ... + 10159508.

It is an arithmetic number, because the mean of its divisors is an integer number (3243142800).

Almost surely, 2^121223102121 is an apocalyptic number.

121223102121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121223102121 is a deficient number, since it is larger than the sum of its proper divisors (86338037079).

121223102121 is a wasteful number, since it uses less digits than its factorization.

121223102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13987 (or 13981 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121223102121 its reverse (121201322121), we get a palindrome (242424424242).

The spelling of 121223102121 in words is "one hundred twenty-one billion, two hundred twenty-three million, one hundred two thousand, one hundred twenty-one".