21013022241 has 32 divisors (see below), whose sum is σ = 32815632000. Its totient is φ = 13252434624.

The previous prime is 21013022183. The next prime is 21013022273. The reversal of 21013022241 is 14222031012.

It is a happy number.

It is not a de Polignac number, because 21013022241 - 2¹³ = 21013014049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21013022141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 334831 + ... + 392603.

It is an arithmetic number, because the mean of its divisors is an integer number (1025488500).

Almost surely, 2^21013022241 is an apocalyptic number.

It is an amenable number.

21013022241 is a deficient number, since it is larger than the sum of its proper divisors (11802609759).

21013022241 is a wasteful number, since it uses less digits than its factorization.

21013022241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58510 (or 58504 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21013022241 its reverse (14222031012), we get a palindrome (35235053253).

The spelling of 21013022241 in words is "twenty-one billion, thirteen million, twenty-two thousand, two hundred forty-one".