20020021111012 has 24 divisors (see below), whose sum is σ = 37730247533496. Its totient is φ = 9239958866688.

The previous prime is 20020021111009. The next prime is 20020021111043. The reversal of 20020021111012 is 21011112002002.

It can be written as a sum of positive squares in 4 ways, for example, as 8528829613056 + 11491191497956 = 2920416^2 + 3389866^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 20020021110983 and 20020021111001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9471408 + ... + 11390680.

It is an arithmetic number, because the mean of its divisors is an integer number (1572093647229).

Almost surely, 2^{20020021111012} is an apocalyptic number.

It is an amenable number.

20020021111012 is a deficient number, since it is larger than the sum of its proper divisors (17710226422484).

20020021111012 is a wasteful number, since it uses less digits than its factorization.

20020021111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119887 (or 2119885 counting only the distinct ones).

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

Adding to 20020021111012 its reverse (21011112002002), we get a palindrome (41031133113014).

The spelling of 20020021111012 in words is "twenty trillion, twenty billion, twenty-one million, one hundred eleven thousand, twelve".