20102222121011 has 4 divisors (see below), whose sum is σ = 20102295782400. Its totient is φ = 20102148459624.

The previous prime is 20102222120987. The next prime is 20102222121013. The reversal of 20102222121011 is 11012122220102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102222121011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102222121013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36419816 + ... + 36967653.

It is an arithmetic number, because the mean of its divisors is an integer number (5025573945600).

Almost surely, 2^{20102222121011} is an apocalyptic number.

20102222121011 is a deficient number, since it is larger than the sum of its proper divisors (73661389).

20102222121011 is an equidigital number, since it uses as much as digits as its factorization.

20102222121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73661388.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20102222121011 its reverse (11012122220102), we get a palindrome (31114344341113).

Subtracting from 20102222121011 its reverse (11012122220102), we obtain a palindrome (9090099900909).

The spelling of 20102222121011 in words is "twenty trillion, one hundred two billion, two hundred twenty-two million, one hundred twenty-one thousand, eleven".