221030020133 has 16 divisors (see below), whose sum is σ = 242938586352. Its totient is φ = 199850112000.

The previous prime is 221030020117. The next prime is 221030020139. The reversal of 221030020133 is 331020030122.

It can be written as a sum of positive squares in 8 ways, for example, as 9693977764 + 211336042369 = 98458^2 + 459713^2 .

It is a cyclic number.

It is not a de Polignac number, because 221030020133 - 2⁴ = 221030020117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221030020139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387158 + ... + 769383.

It is an arithmetic number, because the mean of its divisors is an integer number (15183661647).

Almost surely, 2^221030020133 is an apocalyptic number.

It is an amenable number.

221030020133 is a deficient number, since it is larger than the sum of its proper divisors (21908566219).

221030020133 is a wasteful number, since it uses less digits than its factorization.

221030020133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156856.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 221030020133 its reverse (331020030122), we get a palindrome (552050050255).

The spelling of 221030020133 in words is "two hundred twenty-one billion, thirty million, twenty thousand, one hundred thirty-three".