221330013331 has 4 divisors (see below), whose sum is σ = 252948586672. Its totient is φ = 189711439992.

The previous prime is 221330013251. The next prime is 221330013353. The reversal of 221330013331 is 133310033122.

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 221330013331 - 2²³ = 221321624723 is a prime.

It is a super-2 number, since 2×221330013331² (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 (221330013431) 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, 15809286660 + ... + 15809286673.

It is an arithmetic number, because the mean of its divisors is an integer number (63237146668).

Almost surely, 2^221330013331 is an apocalyptic number.

221330013331 is a deficient number, since it is larger than the sum of its proper divisors (31618573341).

221330013331 is an equidigital number, since it uses as much as digits as its factorization.

221330013331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31618573340.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 221330013331 its reverse (133310033122), we get a palindrome (354640046453).

The spelling of 221330013331 in words is "two hundred twenty-one billion, three hundred thirty million, thirteen thousand, three hundred thirty-one".