20021111010112 has 28 divisors (see below), whose sum is σ = 40380693679396. Its totient is φ = 9846448035840.

The previous prime is 20021111010067. The next prime is 20021111010113. The reversal of 20021111010112 is 21101011112002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 344221583616 + 19676889426496 = 586704^2 + 4435864^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20021111010092 and 20021111010101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021111010113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2564175273 + ... + 2564183080.

It is an arithmetic number, because the mean of its divisors is an integer number (1442167631407).

Almost surely, 2^{20021111010112} is an apocalyptic number.

It is an amenable number.

20021111010112 is an abundant number, since it is smaller than the sum of its proper divisors (20359582669284).

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

20021111010112 is an equidigital number, since it uses as much as digits as its factorization.

20021111010112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5128358426 (or 5128358416 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20021111010112 its reverse (21101011112002), we get a palindrome (41122122122114).

The spelling of 20021111010112 in words is "twenty trillion, twenty-one billion, one hundred eleven million, ten thousand, one hundred twelve".