21220331241 has 12 divisors (see below), whose sum is σ = 29861298672. Its totient is φ = 13402313784.

The previous prime is 21220331227. The next prime is 21220331267. The reversal of 21220331241 is 14213302212.

It is not a de Polignac number, because 21220331241 - 2²² = 21216136937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21220331941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9795931 + ... + 9798096.

It is an arithmetic number, because the mean of its divisors is an integer number (2488441556).

Almost surely, 2^21220331241 is an apocalyptic number.

It is an amenable number.

21220331241 is a deficient number, since it is larger than the sum of its proper divisors (8640967431).

21220331241 is a wasteful number, since it uses less digits than its factorization.

21220331241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19594068 (or 19594049 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21220331241 its reverse (14213302212), we get a palindrome (35433633453).

The spelling of 21220331241 in words is "twenty-one billion, two hundred twenty million, three hundred thirty-one thousand, two hundred forty-one".