21001103310 has 32 divisors (see below), whose sum is σ = 54984707712. Its totient is φ = 5091176480.

The previous prime is 21001103309. The next prime is 21001103339. The reversal of 21001103310 is 1330110012.

It is a super-2 number, since 2×21001103310² (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 15 ways as a sum of consecutive naturals, for example, 31819524 + ... + 31820183.

It is an arithmetic number, because the mean of its divisors is an integer number (1718272116).

Almost surely, 2^21001103310 is an apocalyptic number.

21001103310 is an abundant number, since it is smaller than the sum of its proper divisors (33983604402).

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

21001103310 is a wasteful number, since it uses less digits than its factorization.

21001103310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63639728.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 21001103310 its reverse (1330110012), we get a palindrome (22331213322).

The spelling of 21001103310 in words is "twenty-one billion, one million, one hundred three thousand, three hundred ten".