21002441101 has 8 divisors (see below), whose sum is σ = 21528561600. Its totient is φ = 20476980960.

The previous prime is 21002441081. The next prime is 21002441113. The reversal of 21002441101 is 10114420012.

It is a happy number.

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

It is not a de Polignac number, because 21002441101 - 2⁷ = 21002440973 is a prime.

It is a super-2 number, since 2×21002441101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002441171) 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, 100371 + ... + 228208.

It is an arithmetic number, because the mean of its divisors is an integer number (2691070200).

Almost surely, 2^21002441101 is an apocalyptic number.

It is an amenable number.

21002441101 is a deficient number, since it is larger than the sum of its proper divisors (526120499).

21002441101 is a wasteful number, since it uses less digits than its factorization.

21002441101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330179.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21002441101 its reverse (10114420012), we get a palindrome (31116861113).

The spelling of 21002441101 in words is "twenty-one billion, two million, four hundred forty-one thousand, one hundred one".