221203211131 has 8 divisors (see below), whose sum is σ = 252809872640. Its totient is φ = 189598100328.

The previous prime is 221203211101. The next prime is 221203211191. The reversal of 221203211131 is 131112302122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221203211131 - 2¹³ = 221203202939 is a prime.

It is a super-2 number, since 2×221203211131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221203211099 and 221203211108.

It is not an unprimeable number, because it can be changed into a prime (221203211101) 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, 63981 + ... + 668206.

It is an arithmetic number, because the mean of its divisors is an integer number (31601234080).

Almost surely, 2^221203211131 is an apocalyptic number.

221203211131 is a deficient number, since it is larger than the sum of its proper divisors (31606661509).

221203211131 is an equidigital number, since it uses as much as digits as its factorization.

221203211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775353.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 221203211131 its reverse (131112302122), we get a palindrome (352315513253).

Subtracting from 221203211131 its reverse (131112302122), we obtain a palindrome (90090909009).

The spelling of 221203211131 in words is "two hundred twenty-one billion, two hundred three million, two hundred eleven thousand, one hundred thirty-one".