21507007200011 has 16 divisors (see below), whose sum is σ = 22865957241600. Its totient is φ = 20171496290400.

The previous prime is 21507007199983. The next prime is 21507007200071. The reversal of 21507007200011 is 11000270070512.

It is a cyclic number.

It is not a de Polignac number, because 21507007200011 - 2⁶ = 21507007199947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21507007200071) 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, 9214391 + ... + 11310128.

It is an arithmetic number, because the mean of its divisors is an integer number (1429122327600).

Almost surely, 2^{21507007200011} is an apocalyptic number.

21507007200011 is a deficient number, since it is larger than the sum of its proper divisors (1358950041589).

21507007200011 is a wasteful number, since it uses less digits than its factorization.

21507007200011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20525090.

The product of its (nonzero) digits is 980, while the sum is 26.

Adding to 21507007200011 its reverse (11000270070512), we get a palindrome (32507277270523).

The spelling of 21507007200011 in words is "twenty-one trillion, five hundred seven billion, seven million, two hundred thousand, eleven".