21100320241 has 32 divisors (see below), whose sum is σ = 28500369408. Its totient is φ = 15086053440.

The previous prime is 21100320223. The next prime is 21100320247. The reversal of 21100320241 is 14202300112.

It is a cyclic number.

It is not a de Polignac number, because 21100320241 - 2³³ = 12510385649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100320247) 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, 104056 + ... + 230278.

It is an arithmetic number, because the mean of its divisors is an integer number (890636544).

Almost surely, 2^21100320241 is an apocalyptic number.

It is an amenable number.

21100320241 is a deficient number, since it is larger than the sum of its proper divisors (7400049167).

21100320241 is a wasteful number, since it uses less digits than its factorization.

21100320241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126421.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21100320241 its reverse (14202300112), we get a palindrome (35302620353).

The spelling of 21100320241 in words is "twenty-one billion, one hundred million, three hundred twenty thousand, two hundred forty-one".