21200111022036 has 48 divisors (see below), whose sum is σ = 50044159718784. Its totient is φ = 6984437784576.

The previous prime is 21200111022019. The next prime is 21200111022037. The reversal of 21200111022036 is 63022011100212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200111022037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11391645 + ... + 13121348.

It is an arithmetic number, because the mean of its divisors is an integer number (1042586660808).

Almost surely, 2^{21200111022036} is an apocalyptic number.

It is an amenable number.

21200111022036 is an abundant number, since it is smaller than the sum of its proper divisors (28844048696748).

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

21200111022036 is a wasteful number, since it uses less digits than its factorization.

21200111022036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24513840 (or 24513838 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21200111022036 its reverse (63022011100212), we get a palindrome (84222122122248).

The spelling of 21200111022036 in words is "twenty-one trillion, two hundred billion, one hundred eleven million, twenty-two thousand, thirty-six".