221123120203 has 4 divisors (see below), whose sum is σ = 222171097288. Its totient is φ = 220075143120.

The previous prime is 221123120177. The next prime is 221123120299. The reversal of 221123120203 is 302021321122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221123120203 is a prime.

It is a super-2 number, since 2×221123120203² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221123120303) 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 3 ways as a sum of consecutive naturals, for example, 523988226 + ... + 523988647.

It is an arithmetic number, because the mean of its divisors is an integer number (55542774322).

Almost surely, 2^221123120203 is an apocalyptic number.

221123120203 is a deficient number, since it is larger than the sum of its proper divisors (1047977085).

221123120203 is a wasteful number, since it uses less digits than its factorization.

221123120203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047977084.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 221123120203 its reverse (302021321122), we get a palindrome (523144441325).

The spelling of 221123120203 in words is "two hundred twenty-one billion, one hundred twenty-three million, one hundred twenty thousand, two hundred three".