121121220203 has 8 divisors (see below), whose sum is σ = 128249514288. Its totient is φ = 113993316864.

The previous prime is 121121220193. The next prime is 121121220221. The reversal of 121121220203 is 302022121121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121121220203 - 2¹⁰ = 121121219179 is a prime.

It is a super-2 number, since 2×121121220203² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121220293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 751475 + ... + 898307.

It is an arithmetic number, because the mean of its divisors is an integer number (16031189286).

Almost surely, 2^121121220203 is an apocalyptic number.

121121220203 is a deficient number, since it is larger than the sum of its proper divisors (7128294085).

121121220203 is a wasteful number, since it uses less digits than its factorization.

121121220203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195373.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121121220203 its reverse (302022121121), we get a palindrome (423143341324).

The spelling of 121121220203 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred three".