21210200011050 has 48 divisors (see below), whose sum is σ = 52601748665472. Its totient is φ = 5656004665600.

The previous prime is 21210200010971. The next prime is 21210200011051. The reversal of 21210200011050 is 5011000201212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21210200011051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18975730 + ... + 20062370.

It is an arithmetic number, because the mean of its divisors is an integer number (1095869763864).

Almost surely, 2^{21210200011050} is an apocalyptic number.

21210200011050 is an abundant number, since it is smaller than the sum of its proper divisors (31391548654422).

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

21210200011050 is a wasteful number, since it uses less digits than its factorization.

21210200011050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216783 (or 1216778 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 21210200011050 its reverse (5011000201212), we get a palindrome (26221200212262).

The spelling of 21210200011050 in words is "twenty-one trillion, two hundred ten billion, two hundred million, eleven thousand, fifty".