20021120111102 has 32 divisors (see below), whose sum is σ = 32879579166720. Its totient is φ = 9067827005280.

The previous prime is 20021120111033. The next prime is 20021120111107. The reversal of 20021120111102 is 20111102112002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021120111107) 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, 15321899 + ... + 16577177.

It is an arithmetic number, because the mean of its divisors is an integer number (1027486848960).

Almost surely, 2^{20021120111102} is an apocalyptic number.

20021120111102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20021120111102 is a deficient number, since it is larger than the sum of its proper divisors (12858459055618).

20021120111102 is a wasteful number, since it uses less digits than its factorization.

20021120111102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257896.

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

Adding to 20021120111102 its reverse (20111102112002), we get a palindrome (40132222223104).

Subtracting 20021120111102 from its reverse (20111102112002), we obtain a square (89982000900 = 299970²).

The spelling of 20021120111102 in words is "twenty trillion, twenty-one billion, one hundred twenty million, one hundred eleven thousand, one hundred two".