21022010100221 has 24 divisors (see below), whose sum is σ = 23283415008000. Its totient is φ = 18962972498496.

The previous prime is 21022010100149. The next prime is 21022010100233. The reversal of 21022010100221 is 12200101022012.

It is not a de Polignac number, because 21022010100221 - 2¹⁸ = 21022009838077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022010100196 and 21022010100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022010130221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3160280 + ... + 7213278.

It is an arithmetic number, because the mean of its divisors is an integer number (970142292000).

Almost surely, 2^{21022010100221} is an apocalyptic number.

It is an amenable number.

21022010100221 is a deficient number, since it is larger than the sum of its proper divisors (2261404907779).

21022010100221 is a wasteful number, since it uses less digits than its factorization.

21022010100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4053725 (or 4053712 counting only the distinct ones).

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

Adding to 21022010100221 its reverse (12200101022012), we get a palindrome (33222111122233).

The spelling of 21022010100221 in words is "twenty-one trillion, twenty-two billion, ten million, one hundred thousand, two hundred twenty-one".