21010000220 has 48 divisors (see below), whose sum is σ = 48217776768. Its totient is φ = 7626384960.

The previous prime is 21010000217. The next prime is 21010000223. The reversal of 21010000220 is 2200001012.

It is an interprime number because it is at equal distance from previous prime (21010000217) and next prime (21010000223).

It is a junction number, because it is equal to n+sod(n) for n = 21010000198 and 21010000207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010000223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39047 + ... + 208673.

It is an arithmetic number, because the mean of its divisors is an integer number (1004537016).

Almost surely, 2^21010000220 is an apocalyptic number.

21010000220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010000220 is an abundant number, since it is smaller than the sum of its proper divisors (27207776548).

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

21010000220 is a wasteful number, since it uses less digits than its factorization.

21010000220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170210 (or 170208 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 21010000220 its reverse (2200001012), we get a palindrome (23210001232).

The spelling of 21010000220 in words is "twenty-one billion, ten million, two hundred twenty", and thus it is an aban number.