21112102012011 has 8 divisors (see below), whose sum is σ = 28149498083280. Its totient is φ = 14074720307712.

The previous prime is 21112102012003. The next prime is 21112102012013. The reversal of 21112102012011 is 11021020121112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21112102012011 - 2³ = 21112102012003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112102012013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504411 + ... + 6517563.

It is an arithmetic number, because the mean of its divisors is an integer number (3518687260410).

Almost surely, 2^{21112102012011} is an apocalyptic number.

21112102012011 is a deficient number, since it is larger than the sum of its proper divisors (7037396071269).

21112102012011 is a wasteful number, since it uses less digits than its factorization.

21112102012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7183485.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21112102012011 its reverse (11021020121112), we get a palindrome (32133122133123).

The spelling of 21112102012011 in words is "twenty-one trillion, one hundred twelve billion, one hundred two million, twelve thousand, eleven".