21112102112011 has 8 divisors (see below), whose sum is σ = 21161956460400. Its totient is φ = 21062257661952.

The previous prime is 21112102111963. The next prime is 21112102112021. The reversal of 21112102112011 is 11021120121112.

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 21112102112011 - 2²³ = 21112093723403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112102112021) 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, 1804971 + ... + 6744043.

It is an arithmetic number, because the mean of its divisors is an integer number (2645244557550).

Almost surely, 2^{21112102112011} is an apocalyptic number.

21112102112011 is a deficient number, since it is larger than the sum of its proper divisors (49854348389).

21112102112011 is an equidigital number, since it uses as much as digits as its factorization.

21112102112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4949165.

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

Adding to 21112102112011 its reverse (11021120121112), we get a palindrome (32133222233123).

The spelling of 21112102112011 in words is "twenty-one trillion, one hundred twelve billion, one hundred two million, one hundred twelve thousand, eleven".