21112200133 has 16 divisors (see below), whose sum is σ = 21575666736. Its totient is φ = 20654161920.

The previous prime is 21112200119. The next prime is 21112200139. The reversal of 21112200133 is 33100221112.

It can be written as a sum of positive squares in 8 ways, for example, as 486070209 + 20626129924 = 22047^2 + 143618^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112200133 - 2³³ = 12522265541 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 (21112200139) 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, 4709253 + ... + 4713733.

It is an arithmetic number, because the mean of its divisors is an integer number (1348479171).

Almost surely, 2^21112200133 is an apocalyptic number.

It is an amenable number.

21112200133 is a deficient number, since it is larger than the sum of its proper divisors (463466603).

21112200133 is a wasteful number, since it uses less digits than its factorization.

21112200133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5064.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21112200133 its reverse (33100221112), we get a palindrome (54212421245).

The spelling of 21112200133 in words is "twenty-one billion, one hundred twelve million, two hundred thousand, one hundred thirty-three".