221121121203 has 12 divisors (see below), whose sum is σ = 328029531648. Its totient is φ = 143429916240.

The previous prime is 221121121181. The next prime is 221121121213. The reversal of 221121121203 is 302121121122.

221121121203 is a `hidden beast` number, since 221 + 121 + 121 + 203 = 666.

It is not a de Polignac number, because 221121121203 - 2¹⁶ = 221121055667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221121121213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 332013363 + ... + 332014028.

It is an arithmetic number, because the mean of its divisors is an integer number (27335794304).

Almost surely, 2^221121121203 is an apocalyptic number.

221121121203 is a deficient number, since it is larger than the sum of its proper divisors (106908410445).

221121121203 is a wasteful number, since it uses less digits than its factorization.

221121121203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664027434 (or 664027431 counting only the distinct ones).

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

Adding to 221121121203 its reverse (302121121122), we get a palindrome (523242242325).

The spelling of 221121121203 in words is "two hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred three".