121203321123 has 16 divisors (see below), whose sum is σ = 162462931200. Its totient is φ = 80373918240.

The previous prime is 121203321101. The next prime is 121203321157. The reversal of 121203321123 is 321123302121.

It is not a de Polignac number, because 121203321123 - 2²⁰ = 121202272547 is a prime.

It is a super-2 number, since 2×121203321123² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121203321123.

It is not an unprimeable number, because it can be changed into a prime (121203321163) 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, 390208 + ... + 628226.

It is an arithmetic number, because the mean of its divisors is an integer number (10153933200).

Almost surely, 2^121203321123 is an apocalyptic number.

121203321123 is a deficient number, since it is larger than the sum of its proper divisors (41259610077).

121203321123 is a wasteful number, since it uses less digits than its factorization.

121203321123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238922.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 121203321123 its reverse (321123302121), we get a palindrome (442326623244).

The spelling of 121203321123 in words is "one hundred twenty-one billion, two hundred three million, three hundred twenty-one thousand, one hundred twenty-three".