21200201002120 has 64 divisors (see below), whose sum is σ = 54628612531200. Its totient is φ = 7253465683200.

The previous prime is 21200201002063. The next prime is 21200201002121. The reversal of 21200201002120 is 2120010200212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21200201002120.

It is not an unprimeable number, because it can be changed into a prime (21200201002121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78900331 + ... + 79168570.

It is an arithmetic number, because the mean of its divisors is an integer number (853572070800).

Almost surely, 2^{21200201002120} is an apocalyptic number.

21200201002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200201002120 is an abundant number, since it is smaller than the sum of its proper divisors (33428411529080).

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

21200201002120 is a wasteful number, since it uses less digits than its factorization.

21200201002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158069398 (or 158069394 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21200201002120 its reverse (2120010200212), we get a palindrome (23320211202332).

The spelling of 21200201002120 in words is "twenty-one trillion, two hundred billion, two hundred one million, two thousand, one hundred twenty".