21220411032200 has 48 divisors (see below), whose sum is σ = 49417419398580. Its totient is φ = 8474407208960.

The previous prime is 21220411032199. The next prime is 21220411032239. The reversal of 21220411032200 is 223011402212.

It can be written as a sum of positive squares in 6 ways, for example, as 1578123862756 + 19642287169444 = 1256234^2 + 4431962^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85858817 + ... + 86105616.

Almost surely, 2^{21220411032200} is an apocalyptic number.

21220411032200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220411032200 is an abundant number, since it is smaller than the sum of its proper divisors (28197008366380).

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

21220411032200 is a wasteful number, since it uses less digits than its factorization.

21220411032200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171965066 (or 171965057 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21220411032200 its reverse (223011402212), we get a palindrome (21443422434412).

The spelling of 21220411032200 in words is "twenty-one trillion, two hundred twenty billion, four hundred eleven million, thirty-two thousand, two hundred".