21212323030200 has 96 divisors (see below), whose sum is σ = 65765451634560. Its totient is φ = 5655995798400.

The previous prime is 21212323030183. The next prime is 21212323030229. The reversal of 21212323030200 is 203032321212.

It is a happy number.

It is a super-2 number, since 2×21212323030200² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 3510157 + ... + 7399043.

It is an arithmetic number, because the mean of its divisors is an integer number (685056787860).

Almost surely, 2^{21212323030200} is an apocalyptic number.

21212323030200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21212323030200 is an abundant number, since it is smaller than the sum of its proper divisors (44553128604360).

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

21212323030200 is a wasteful number, since it uses less digits than its factorization.

21212323030200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3897997 (or 3897988 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21212323030200 its reverse (203032321212), we get a palindrome (21415355351412).

The spelling of 21212323030200 in words is "twenty-one trillion, two hundred twelve billion, three hundred twenty-three million, thirty thousand, two hundred".