21210110200 has 48 divisors (see below), whose sum is σ = 49792326480. Its totient is φ = 8401666560.

The previous prime is 21210110183. The next prime is 21210110263. The reversal of 21210110200 is 201101212.

It is a super-2 number, since 2×21210110200² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 494209 + ... + 535408.

It is an arithmetic number, because the mean of its divisors is an integer number (1037340135).

Almost surely, 2^21210110200 is an apocalyptic number.

21210110200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210110200 is an abundant number, since it is smaller than the sum of its proper divisors (28582216280).

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

21210110200 is a wasteful number, since it uses less digits than its factorization.

21210110200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029736 (or 1029727 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21210110200 its reverse (201101212), we get a palindrome (21411211412).

The spelling of 21210110200 in words is "twenty-one billion, two hundred ten million, one hundred ten thousand, two hundred".