21103101132 has 12 divisors (see below), whose sum is σ = 49240569336. Its totient is φ = 7034367040.

The previous prime is 21103101077. The next prime is 21103101137. The reversal of 21103101132 is 23110130112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (21103101137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 879295869 + ... + 879295892.

It is an arithmetic number, because the mean of its divisors is an integer number (4103380778).

Almost surely, 2^21103101132 is an apocalyptic number.

It is an amenable number.

21103101132 is an abundant number, since it is smaller than the sum of its proper divisors (28137468204).

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

21103101132 is a wasteful number, since it uses less digits than its factorization.

21103101132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758591768 (or 1758591766 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21103101132 its reverse (23110130112), we get a palindrome (44213231244).

The spelling of 21103101132 in words is "twenty-one billion, one hundred three million, one hundred one thousand, one hundred thirty-two".