20021020111120 has 160 divisors (see below), whose sum is σ = 56673621727488. Its totient is φ = 6420928610304.

The previous prime is 20021020111111. The next prime is 20021020111121. The reversal of 20021020111120 is 2111102012002.

It is a self number, because there is not a number n which added to its sum of digits gives 20021020111120.

It is not an unprimeable number, because it can be changed into a prime (20021020111121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4899309 + ... + 8002828.

Almost surely, 2^{20021020111120} is an apocalyptic number.

20021020111120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021020111120 is an abundant number, since it is smaller than the sum of its proper divisors (36652601616368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20021020111120 is a wasteful number, since it uses less digits than its factorization.

20021020111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12902337 (or 12902331 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20021020111120 its reverse (2111102012002), we get a palindrome (22132122123122).

The spelling of 20021020111120 in words is "twenty trillion, twenty-one billion, twenty million, one hundred eleven thousand, one hundred twenty".