20021102112011 has 32 divisors (see below), whose sum is σ = 26884576685568. Its totient is φ = 14399133661440.

The previous prime is 20021102111977. The next prime is 20021102112043. The reversal of 20021102112011 is 11021120112002.

It is not a de Polignac number, because 20021102112011 - 2⁶ = 20021102111947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20021102112511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7573940 + ... + 9869486.

It is an arithmetic number, because the mean of its divisors is an integer number (840143021424).

Almost surely, 2^{20021102112011} is an apocalyptic number.

20021102112011 is a deficient number, since it is larger than the sum of its proper divisors (6863474573557).

20021102112011 is a wasteful number, since it uses less digits than its factorization.

20021102112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304291.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20021102112011 its reverse (11021120112002), we get a palindrome (31042222224013).

Subtracting from 20021102112011 its reverse (11021120112002), we obtain a square (8999982000009 = 2999997²).

It can be divided in two parts, 2002 and 1102112011, that multiplied together give a palindrome (2206428246022).

The spelling of 20021102112011 in words is "twenty trillion, twenty-one billion, one hundred two million, one hundred twelve thousand, eleven".