221530020133 has 4 divisors (see below), whose sum is σ = 221574340000. Its totient is φ = 221485700268.

The previous prime is 221530020113. The next prime is 221530020181. The reversal of 221530020133 is 331020035122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221530020133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221530020113) 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, 22152435 + ... + 22162432.

It is an arithmetic number, because the mean of its divisors is an integer number (55393585000).

Almost surely, 2^221530020133 is an apocalyptic number.

It is an amenable number.

221530020133 is a deficient number, since it is larger than the sum of its proper divisors (44319867).

221530020133 is an equidigital number, since it uses as much as digits as its factorization.

221530020133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44319866.

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 221530020133 its reverse (331020035122), we get a palindrome (552550055255).

The spelling of 221530020133 in words is "two hundred twenty-one billion, five hundred thirty million, twenty thousand, one hundred thirty-three".