21213032211200 has 108 divisors (see below), whose sum is σ = 52572297839880. Its totient is φ = 8474429153280.

The previous prime is 21213032211079. The next prime is 21213032211211. The reversal of 21213032211200 is 211223031212.

It is a super-2 number, since 2×21213032211200² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 2930996 + ... + 7142604.

Almost surely, 2^{21213032211200} is an apocalyptic number.

21213032211200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21213032211200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26286148919940).

21213032211200 is an abundant number, since it is smaller than the sum of its proper divisors (31359265628680).

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

21213032211200 is an equidigital number, since it uses as much as digits as its factorization.

21213032211200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4212422 (or 4212403 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21213032211200 its reverse (211223031212), we get a palindrome (21424255242412).

The spelling of 21213032211200 in words is "twenty-one trillion, two hundred thirteen billion, thirty-two million, two hundred eleven thousand, two hundred".