21102010132 has 18 divisors (see below), whose sum is σ = 42957663882. Its totient is φ = 9043718544.

The previous prime is 21102010117. The next prime is 21102010141. The reversal of 21102010132 is 23101020112.

It can be written as a sum of positive squares in only one way, i.e., 11678260356 + 9423749776 = 108066^2 + 97076^2 .

It is a super-2 number, since 2×21102010132² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53831463 + ... + 53831854.

Almost surely, 2^21102010132 is an apocalyptic number.

It is an amenable number.

21102010132 is an abundant number, since it is smaller than the sum of its proper divisors (21855653750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21102010132 is a wasteful number, since it uses less digits than its factorization.

21102010132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107663335 (or 107663326 counting only the distinct ones).

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

Adding to 21102010132 its reverse (23101020112), we get a palindrome (44203030244).

The spelling of 21102010132 in words is "twenty-one billion, one hundred two million, ten thousand, one hundred thirty-two".