21241203101 has 8 divisors (see below), whose sum is σ = 21656035800. Its totient is φ = 20826891072.

The previous prime is 21241203097. The next prime is 21241203143. The reversal of 21241203101 is 10130214212.

It can be written as a sum of positive squares in 4 ways, for example, as 426216025 + 20814987076 = 20645^2 + 144274^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21241203101 - 2² = 21241203097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21241203101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21243203101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47270 + ... + 211463.

It is an arithmetic number, because the mean of its divisors is an integer number (2707004475).

Almost surely, 2^21241203101 is an apocalyptic number.

It is an amenable number.

21241203101 is a deficient number, since it is larger than the sum of its proper divisors (414832699).

21241203101 is a wasteful number, since it uses less digits than its factorization.

21241203101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260335.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21241203101 its reverse (10130214212), we get a palindrome (31371417313).

The spelling of 21241203101 in words is "twenty-one billion, two hundred forty-one million, two hundred three thousand, one hundred one".