21011024101 has 32 divisors (see below), whose sum is σ = 23274915840. Its totient is φ = 18903456000.

The previous prime is 21011024071. The next prime is 21011024119. The reversal of 21011024101 is 10142011012.

It is a cyclic number.

It is not a de Polignac number, because 21011024101 - 2¹⁹ = 21010499813 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 (21011024131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4116451 + ... + 4121551.

It is an arithmetic number, because the mean of its divisors is an integer number (727341120).

Almost surely, 2^21011024101 is an apocalyptic number.

It is an amenable number.

21011024101 is a deficient number, since it is larger than the sum of its proper divisors (2263891739).

21011024101 is a wasteful number, since it uses less digits than its factorization.

21011024101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5317.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21011024101 its reverse (10142011012), we get a palindrome (31153035113).

The spelling of 21011024101 in words is "twenty-one billion, eleven million, twenty-four thousand, one hundred one".