21001132110 has 32 divisors (see below), whose sum is σ = 57603105792. Its totient is φ = 4800258720.

The previous prime is 21001132049. The next prime is 21001132157. The reversal of 21001132110 is 1123110012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50002486 + ... + 50002905.

It is an arithmetic number, because the mean of its divisors is an integer number (1800097056).

Almost surely, 2^21001132110 is an apocalyptic number.

21001132110 is an abundant number, since it is smaller than the sum of its proper divisors (36601973682).

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

21001132110 is a wasteful number, since it uses less digits than its factorization.

21001132110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100005408.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21001132110 its reverse (1123110012), we get a palindrome (22124242122).

The spelling of 21001132110 in words is "twenty-one billion, one million, one hundred thirty-two thousand, one hundred ten".