21000221103310 has 32 divisors (see below), whose sum is σ = 37885328893152. Its totient is φ = 8381225448960.

The previous prime is 21000221103289. The next prime is 21000221103311. The reversal of 21000221103310 is 1330112200012.

It is a super-2 number, since 2×21000221103310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000221103311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15321954 + ... + 16636186.

It is an arithmetic number, because the mean of its divisors is an integer number (1183916527911).

Almost surely, 2^{21000221103310} is an apocalyptic number.

21000221103310 is a deficient number, since it is larger than the sum of its proper divisors (16885107789842).

21000221103310 is a wasteful number, since it uses less digits than its factorization.

21000221103310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317828.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21000221103310 its reverse (1330112200012), we get a palindrome (22330333303322).

The spelling of 21000221103310 in words is "twenty-one trillion, two hundred twenty-one million, one hundred three thousand, three hundred ten".