21112222101011 has 4 divisors (see below), whose sum is σ = 21116749710672. Its totient is φ = 21107694491352.

The previous prime is 21112222100993. The next prime is 21112222101013. The reversal of 21112222101011 is 11010122221112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21112222101011 - 2³⁴ = 21095042231827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112222101013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2263797836 + ... + 2263807161.

It is an arithmetic number, because the mean of its divisors is an integer number (5279187427668).

Almost surely, 2^{21112222101011} is an apocalyptic number.

21112222101011 is a deficient number, since it is larger than the sum of its proper divisors (4527609661).

21112222101011 is an equidigital number, since it uses as much as digits as its factorization.

21112222101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4527609660.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21112222101011 its reverse (11010122221112), we get a palindrome (32122344322123).

The spelling of 21112222101011 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-two million, one hundred one thousand, eleven".