21113500201001 has 8 divisors (see below), whose sum is σ = 23521671311880. Its totient is φ = 18817337048832.

The previous prime is 21113500200967. The next prime is 21113500201061. The reversal of 21113500201001 is 10010200531112.

It can be written as a sum of positive squares in 4 ways, for example, as 419416845376 + 20694083355625 = 647624^2 + 4549075^2 .

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 21113500201001 - 2⁶ = 21113500200937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21113500201061) 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, 28001989280 + ... + 28001990033.

It is an arithmetic number, because the mean of its divisors is an integer number (2940208913985).

Almost surely, 2^{21113500201001} is an apocalyptic number.

It is an amenable number.

21113500201001 is a deficient number, since it is larger than the sum of its proper divisors (2408171110879).

21113500201001 is a wasteful number, since it uses less digits than its factorization.

21113500201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56003979355.

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 21113500201001 its reverse (10010200531112), we get a palindrome (31123700732113).

The spelling of 21113500201001 in words is "twenty-one trillion, one hundred thirteen billion, five hundred million, two hundred one thousand, one".