221013133331 has 4 divisors (see below), whose sum is σ = 221014214064. Its totient is φ = 221012052600.

The previous prime is 221013133279. The next prime is 221013133351. The reversal of 221013133331 is 133331310122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 133331310122 = 2 ⋅66665655061.

It is a cyclic number.

It is not a de Polignac number, because 221013133331 - 2³⁴ = 203833264147 is a prime.

It is a super-2 number, since 2×221013133331² (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 = 221013133297 and 221013133306.

It is not an unprimeable number, because it can be changed into a prime (221013133351) 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, 129455 + ... + 677336.

It is an arithmetic number, because the mean of its divisors is an integer number (55253553516).

Almost surely, 2^221013133331 is an apocalyptic number.

221013133331 is a deficient number, since it is larger than the sum of its proper divisors (1080733).

221013133331 is an equidigital number, since it uses as much as digits as its factorization.

221013133331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080732.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 221013133331 its reverse (133331310122), we get a palindrome (354344443453).

The spelling of 221013133331 in words is "two hundred twenty-one billion, thirteen million, one hundred thirty-three thousand, three hundred thirty-one".