231221120203 has 8 divisors (see below), whose sum is σ = 239040976256. Its totient is φ = 223423833600.

The previous prime is 231221120201. The next prime is 231221120257. The reversal of 231221120203 is 302021122132.

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 231221120203 - 2¹ = 231221120201 is a prime.

It is a super-2 number, since 2×231221120203² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231221120201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5621526 + ... + 5662507.

It is an arithmetic number, because the mean of its divisors is an integer number (29880122032).

Almost surely, 2^231221120203 is an apocalyptic number.

231221120203 is a deficient number, since it is larger than the sum of its proper divisors (7819856053).

231221120203 is a wasteful number, since it uses less digits than its factorization.

231221120203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11284725.

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

Adding to 231221120203 its reverse (302021122132), we get a palindrome (533242242335).

The spelling of 231221120203 in words is "two hundred thirty-one billion, two hundred twenty-one million, one hundred twenty thousand, two hundred three".