221312130203 has 4 divisors (see below), whose sum is σ = 221494581648. Its totient is φ = 221129678760.

The previous prime is 221312130199. The next prime is 221312130209. The reversal of 221312130203 is 302031213122.

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

It is a cyclic number.

It is not a de Polignac number, because 221312130203 - 2² = 221312130199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221312130209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91223903 + ... + 91226328.

It is an arithmetic number, because the mean of its divisors is an integer number (55373645412).

Almost surely, 2^221312130203 is an apocalyptic number.

221312130203 is a deficient number, since it is larger than the sum of its proper divisors (182451445).

221312130203 is a wasteful number, since it uses less digits than its factorization.

221312130203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182451444.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 221312130203 its reverse (302031213122), we get a palindrome (523343343325).

The spelling of 221312130203 in words is "two hundred twenty-one billion, three hundred twelve million, one hundred thirty thousand, two hundred three".