221312130201 has 28 divisors (see below), whose sum is σ = 332692324080. Its totient is φ = 147151945080.

The previous prime is 221312130199. The next prime is 221312130209. The reversal of 221312130201 is 102031213122.

221312130201 is a `hidden beast` number, since 2 + 21 + 312 + 130 + 201 = 666.

It is not a de Polignac number, because 221312130201 - 2¹ = 221312130199 is a prime.

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 27 ways as a sum of consecutive naturals, for example, 124215 + ... + 676796.

Almost surely, 2^221312130201 is an apocalyptic number.

It is an amenable number.

221312130201 is a deficient number, since it is larger than the sum of its proper divisors (111380193879).

221312130201 is an frugal number, since it uses more digits than its factorization.

221312130201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801408 (or 801393 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 221312130201 its reverse (102031213122), we get a palindrome (323343343323).

The spelling of 221312130201 in words is "two hundred twenty-one billion, three hundred twelve million, one hundred thirty thousand, two hundred one".