21001112002200 has 384 divisors, whose sum is σ = 71640909688320. Its totient is φ = 5046959923200.

The previous prime is 21001112002193. The next prime is 21001112002253. The reversal of 21001112002200 is 220021110012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 448651197 + ... + 448698003.

It is an arithmetic number, because the mean of its divisors is an integer number (186564868980).

Almost surely, 2^{21001112002200} is an apocalyptic number.

21001112002200 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 21001112002200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35820454844160).

21001112002200 is an abundant number, since it is smaller than the sum of its proper divisors (50639797686120).

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

21001112002200 is a wasteful number, since it uses less digits than its factorization.

21001112002200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47427 (or 47418 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21001112002200 its reverse (220021110012), we get a palindrome (21221133112212).

The spelling of 21001112002200 in words is "twenty-one trillion, one billion, one hundred twelve million, two thousand, two hundred".