121201322200123 has 4 divisors (see below), whose sum is σ = 132219624218328. Its totient is φ = 110183020181920.

The previous prime is 121201322200117. The next prime is 121201322200141. The reversal of 121201322200123 is 321002223102121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121201322200123 - 2⁹ = 121201322199611 is a prime.

It is a super-2 number, since 2×121201322200123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121201322200094 and 121201322200103.

It is not an unprimeable number, because it can be changed into a prime (121201322200103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5509151009086 + ... + 5509151009107.

It is an arithmetic number, because the mean of its divisors is an integer number (33054906054582).

Almost surely, 2^{121201322200123} is an apocalyptic number.

121201322200123 is a deficient number, since it is larger than the sum of its proper divisors (11018302018205).

121201322200123 is a wasteful number, since it uses less digits than its factorization.

121201322200123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11018302018204.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 121201322200123 its reverse (321002223102121), we get a palindrome (442203545302244).

The spelling of 121201322200123 in words is "one hundred twenty-one trillion, two hundred one billion, three hundred twenty-two million, two hundred thousand, one hundred twenty-three".