21202110011011 has 8 divisors (see below), whose sum is σ = 22292778193200. Its totient is φ = 20135412558240.

The previous prime is 21202110010999. The next prime is 21202110011021. The reversal of 21202110011011 is 11011001120212.

It is a happy number.

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 21202110011011 - 2¹⁵ = 21202109978243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21202110010982 and 21202110011000.

It is not an unprimeable number, because it can be changed into a prime (21202110011021) 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 7 ways as a sum of consecutive naturals, for example, 5992680541 + ... + 5992684078.

It is an arithmetic number, because the mean of its divisors is an integer number (2786597274150).

Almost surely, 2^{21202110011011} is an apocalyptic number.

21202110011011 is a deficient number, since it is larger than the sum of its proper divisors (1090668182189).

21202110011011 is a wasteful number, since it uses less digits than its factorization.

21202110011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11985364709.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21202110011011 its reverse (11011001120212), we get a palindrome (32213111131223).

The spelling of 21202110011011 in words is "twenty-one trillion, two hundred two billion, one hundred ten million, eleven thousand, eleven".