20102221002011 has 4 divisors (see below), whose sum is σ = 20104918932024. Its totient is φ = 20099523072000.

The previous prime is 20102221001983. The next prime is 20102221002023. The reversal of 20102221002011 is 11020012220102.

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 20102221002011 - 2¹⁰ = 20102221000987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102221004011) 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, 1348953830 + ... + 1348968731.

It is an arithmetic number, because the mean of its divisors is an integer number (5026229733006).

Almost surely, 2^{20102221002011} is an apocalyptic number.

20102221002011 is a deficient number, since it is larger than the sum of its proper divisors (2697930013).

20102221002011 is an equidigital number, since it uses as much as digits as its factorization.

20102221002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697930012.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20102221002011 its reverse (11020012220102), we get a palindrome (31122233222113).

The spelling of 20102221002011 in words is "twenty trillion, one hundred two billion, two hundred twenty-one million, two thousand, eleven".