21100210132 has 6 divisors (see below), whose sum is σ = 36925367738. Its totient is φ = 10550105064.

The previous prime is 21100210121. The next prime is 21100210139. The reversal of 21100210132 is 23101200112.

It can be written as a sum of positive squares in only one way, i.e., 15297731856 + 5802478276 = 123684^2 + 76174^2 .

It is a super-2 number, since 2×21100210132² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100210139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2637526263 + ... + 2637526270.

Almost surely, 2^21100210132 is an apocalyptic number.

It is an amenable number.

21100210132 is a deficient number, since it is larger than the sum of its proper divisors (15825157606).

21100210132 is a wasteful number, since it uses less digits than its factorization.

21100210132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5275052537 (or 5275052535 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21100210132 its reverse (23101200112), we get a palindrome (44201410244).

The spelling of 21100210132 in words is "twenty-one billion, one hundred million, two hundred ten thousand, one hundred thirty-two".