21221020200110 has 24 divisors (see below), whose sum is σ = 38663596139400. Its totient is φ = 8386138075952.

The previous prime is 21221020200101. The next prime is 21221020200131. The reversal of 21221020200110 is 1100202012212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153952160 + ... + 154089939.

It is an arithmetic number, because the mean of its divisors is an integer number (1610983172475).

Almost surely, 2^{21221020200110} is an apocalyptic number.

21221020200110 is a deficient number, since it is larger than the sum of its proper divisors (17442575939290).

21221020200110 is an equidigital number, since it uses as much as digits as its factorization.

21221020200110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308042272 (or 308042189 counting only the distinct ones).

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

Adding to 21221020200110 its reverse (1100202012212), we get a palindrome (22321222212322).

The spelling of 21221020200110 in words is "twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred thousand, one hundred ten".