21202222210200 has 72 divisors (see below), whose sum is σ = 71204129595300. Its totient is φ = 5653925922240.

The previous prime is 21202222210189. The next prime is 21202222210237. The reversal of 21202222210200 is 201222220212.

21202222210200 is a `hidden beast` number, since 2 + 1 + 20 + 222 + 221 + 0 + 200 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5889504370 + ... + 5889507969.

Almost surely, 2^{21202222210200} is an apocalyptic number.

21202222210200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202222210200 is an abundant number, since it is smaller than the sum of its proper divisors (50001907385100).

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

21202222210200 is a wasteful number, since it uses less digits than its factorization.

21202222210200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11779012361 (or 11779012349 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21202222210200 its reverse (201222220212), we get a palindrome (21403444430412).

The spelling of 21202222210200 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-two million, two hundred ten thousand, two hundred".