21221020020110 has 32 divisors (see below), whose sum is σ = 38580050557152. Its totient is φ = 8403488956800.

The previous prime is 21221020020041. The next prime is 21221020020121. The reversal of 21221020020110 is 1102002012212.

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, 8649992 + ... + 10828868.

It is an arithmetic number, because the mean of its divisors is an integer number (1205626579911).

Almost surely, 2^{21221020020110} is an apocalyptic number.

21221020020110 is a deficient number, since it is larger than the sum of its proper divisors (17359030537042).

21221020020110 is a wasteful number, since it uses less digits than its factorization.

21221020020110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188628.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21221020020110 its reverse (1102002012212), we get a palindrome (22323022032322).

The spelling of 21221020020110 in words is "twenty-one trillion, two hundred twenty-one billion, twenty million, twenty thousand, one hundred ten".