21035500241 has 16 divisors (see below), whose sum is σ = 25098336000. Its totient is φ = 17237888448.

The previous prime is 21035500121. The next prime is 21035500253. The reversal of 21035500241 is 14200553012.

It is a cyclic number.

It is not a de Polignac number, because 21035500241 - 2¹⁸ = 21035238097 is a prime.

It is a super-2 number, since 2×21035500241² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (21035500741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301535 + ... + 364683.

It is an arithmetic number, because the mean of its divisors is an integer number (1568646000).

Almost surely, 2^21035500241 is an apocalyptic number.

It is an amenable number.

21035500241 is a deficient number, since it is larger than the sum of its proper divisors (4062835759).

21035500241 is a wasteful number, since it uses less digits than its factorization.

21035500241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65248.

The product of its (nonzero) digits is 1200, while the sum is 23.

The spelling of 21035500241 in words is "twenty-one billion, thirty-five million, five hundred thousand, two hundred forty-one".