20021020102211 has 4 divisors (see below), whose sum is σ = 20021436465624. Its totient is φ = 20020603738800.

The previous prime is 20021020102163. The next prime is 20021020102241. The reversal of 20021020102211 is 11220102012002.

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 20021020102211 - 2¹⁸ = 20021019840067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021020102241) 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, 208109570 + ... + 208205751.

It is an arithmetic number, because the mean of its divisors is an integer number (5005359116406).

Almost surely, 2^{20021020102211} is an apocalyptic number.

20021020102211 is a deficient number, since it is larger than the sum of its proper divisors (416363413).

20021020102211 is an equidigital number, since it uses as much as digits as its factorization.

20021020102211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416363412.

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

Adding to 20021020102211 its reverse (11220102012002), we get a palindrome (31241122114213).

The spelling of 20021020102211 in words is "twenty trillion, twenty-one billion, twenty million, one hundred two thousand, two hundred eleven".