21220410441 has 32 divisors (see below), whose sum is σ = 29025285120. Its totient is φ = 13786171200.

The previous prime is 21220410427. The next prime is 21220410457. The reversal of 21220410441 is 14401402212.

It is not a de Polignac number, because 21220410441 - 2⁷ = 21220410313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220410481) 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, 10186386 + ... + 10188468.

It is an arithmetic number, because the mean of its divisors is an integer number (907040160).

Almost surely, 2^21220410441 is an apocalyptic number.

It is an amenable number.

21220410441 is a deficient number, since it is larger than the sum of its proper divisors (7804874679).

21220410441 is a wasteful number, since it uses less digits than its factorization.

21220410441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21220410441 its reverse (14401402212), we get a palindrome (35621812653).

The spelling of 21220410441 in words is "twenty-one billion, two hundred twenty million, four hundred ten thousand, four hundred forty-one".