20102202011 has 4 divisors (see below), whose sum is σ = 20106383472. Its totient is φ = 20098020552.

The previous prime is 20102201947. The next prime is 20102202013. The reversal of 20102202011 is 11020220102.

It is a happy number.

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 20102202011 - 2⁶ = 20102201947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102201983 and 20102202001.

It is not an unprimeable number, because it can be changed into a prime (20102202013) 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, 2083511 + ... + 2093136.

It is an arithmetic number, because the mean of its divisors is an integer number (5026595868).

Almost surely, 2^20102202011 is an apocalyptic number.

20102202011 is a deficient number, since it is larger than the sum of its proper divisors (4181461).

20102202011 is an equidigital number, since it uses as much as digits as its factorization.

20102202011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4181460.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20102202011 its reverse (11020220102), we get a palindrome (31122422113).

The spelling of 20102202011 in words is "twenty billion, one hundred two million, two hundred two thousand, eleven".