21670212200 has 96 divisors (see below), whose sum is σ = 62010197760. Its totient is φ = 6858259200.

The previous prime is 21670212191. The next prime is 21670212217. The reversal of 21670212200 is 221207612.

It is a happy number.

It is a super-3 number, since 3×21670212200³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 577136 + ... + 613535.

It is an arithmetic number, because the mean of its divisors is an integer number (645939560).

Almost surely, 2^21670212200 is an apocalyptic number.

21670212200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21670212200 is an abundant number, since it is smaller than the sum of its proper divisors (40339985560).

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

21670212200 is a wasteful number, since it uses less digits than its factorization.

21670212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190707 (or 1190698 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 21670212200 its reverse (221207612), we get a palindrome (21891419812).

The spelling of 21670212200 in words is "twenty-one billion, six hundred seventy million, two hundred twelve thousand, two hundred".