20021102211 has 16 divisors (see below), whose sum is σ = 29132149248. Its totient is φ = 12129607200.

The previous prime is 20021102209. The next prime is 20021102221. The reversal of 20021102211 is 11220112002.

It is not a de Polignac number, because 20021102211 - 2¹ = 20021102209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20021102221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16155 + ... + 200756.

It is an arithmetic number, because the mean of its divisors is an integer number (1820759328).

Almost surely, 2^20021102211 is an apocalyptic number.

20021102211 is a deficient number, since it is larger than the sum of its proper divisors (9111047037).

20021102211 is a wasteful number, since it uses less digits than its factorization.

20021102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219722.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20021102211 its reverse (11220112002), we get a palindrome (31241214213).

The spelling of 20021102211 in words is "twenty billion, twenty-one million, one hundred two thousand, two hundred eleven".