21001222202200 has 24 divisors (see below), whose sum is σ = 48827841620580. Its totient is φ = 8400488880800.

The previous prime is 21001222202197. The next prime is 21001222202203. The reversal of 21001222202200 is 220222210012.

It is an interprime number because it is at equal distance from previous prime (21001222202197) and next prime (21001222202203).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001222202203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52503055306 + ... + 52503055705.

Almost surely, 2^{21001222202200} is an apocalyptic number.

21001222202200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21001222202200 is an abundant number, since it is smaller than the sum of its proper divisors (27826619418380).

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

21001222202200 is a wasteful number, since it uses less digits than its factorization.

21001222202200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105006111027 (or 105006111018 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21001222202200 its reverse (220222210012), we get a palindrome (21221444412212).

The spelling of 21001222202200 in words is "twenty-one trillion, one billion, two hundred twenty-two million, two hundred two thousand, two hundred".