21241434101 has 4 divisors (see below), whose sum is σ = 21242301600. Its totient is φ = 21240566604.

The previous prime is 21241434079. The next prime is 21241434131. The reversal of 21241434101 is 10143414212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21241434101 - 2³⁰ = 20167692277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241434131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395921 + ... + 446358.

It is an arithmetic number, because the mean of its divisors is an integer number (5310575400).

Almost surely, 2^21241434101 is an apocalyptic number.

It is an amenable number.

21241434101 is a deficient number, since it is larger than the sum of its proper divisors (867499).

21241434101 is an equidigital number, since it uses as much as digits as its factorization.

21241434101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867498.

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

Adding to 21241434101 its reverse (10143414212), we get a palindrome (31384848313).

The spelling of 21241434101 in words is "twenty-one billion, two hundred forty-one million, four hundred thirty-four thousand, one hundred one".