20021112011 has 8 divisors (see below), whose sum is σ = 20594504784. Its totient is φ = 19455628320.

The previous prime is 20021111969. The next prime is 20021112053. The reversal of 20021112011 is 11021112002.

It is an interprime number because it is at equal distance from previous prime (20021111969) and next prime (20021112053).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20021112011 - 2³⁰ = 18947370187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021111983 and 20021112001.

It is not an unprimeable number, because it can be changed into a prime (20021112061) 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 7 ways as a sum of consecutive naturals, for example, 1972136 + ... + 1982261.

It is an arithmetic number, because the mean of its divisors is an integer number (2574313098).

Almost surely, 2^20021112011 is an apocalyptic number.

20021112011 is a deficient number, since it is larger than the sum of its proper divisors (573392773).

20021112011 is an equidigital number, since it uses as much as digits as its factorization.

20021112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3954541.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20021112011 its reverse (11021112002), we get a palindrome (31042224013).

Subtracting from 20021112011 its reverse (11021112002), we obtain a palindrome (9000000009).

The spelling of 20021112011 in words is "twenty billion, twenty-one million, one hundred twelve thousand, eleven".