21011034221024 has 48 divisors (see below), whose sum is σ = 43842668437008. Its totient is φ = 9877627963392.

The previous prime is 21011034220993. The next prime is 21011034221027. The reversal of 21011034221024 is 42012243011012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011034221027) 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 7 ways as a sum of consecutive naturals, for example, 18827354 + ... + 19912089.

It is an arithmetic number, because the mean of its divisors is an integer number (913388925771).

Almost surely, 2^{21011034221024} is an apocalyptic number.

It is an amenable number.

21011034221024 is an abundant number, since it is smaller than the sum of its proper divisors (22831634215984).

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

21011034221024 is a wasteful number, since it uses less digits than its factorization.

21011034221024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38740467 (or 38740459 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21011034221024 its reverse (42012243011012), we get a palindrome (63023277232036).

The spelling of 21011034221024 in words is "twenty-one trillion, eleven billion, thirty-four million, two hundred twenty-one thousand, twenty-four".