21121222010011 has 8 divisors (see below), whose sum is σ = 21781732896000. Its totient is φ = 20470795259880.

The previous prime is 21121222009969. The next prime is 21121222010047. The reversal of 21121222010011 is 11001022212112.

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 21121222010011 - 2¹⁵ = 21121221977243 is a prime.

It is a super-3 number, since 3×21121222010011³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21121222011011) 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, 2521029711 + ... + 2521038088.

It is an arithmetic number, because the mean of its divisors is an integer number (2722716612000).

Almost surely, 2^{21121222010011} is an apocalyptic number.

21121222010011 is a deficient number, since it is larger than the sum of its proper divisors (660510885989).

21121222010011 is an equidigital number, since it uses as much as digits as its factorization.

21121222010011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5042067929.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21121222010011 its reverse (11001022212112), we get a palindrome (32122244222123).

The spelling of 21121222010011 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twenty-two million, ten thousand, eleven".