21020022002112 has 112 divisors (see below), whose sum is σ = 64123025862912. Its totient is φ = 5952572559360.

The previous prime is 21020022002099. The next prime is 21020022002113. The reversal of 21020022002112 is 21120022002012.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 21020022002091 and 21020022002100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020022002113) 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, 69051214 + ... + 69354957.

Almost surely, 2^{21020022002112} is an apocalyptic number.

It is an amenable number.

21020022002112 is an abundant number, since it is smaller than the sum of its proper divisors (43103003860800).

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

21020022002112 is a wasteful number, since it uses less digits than its factorization.

21020022002112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138406306 (or 138406296 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21020022002112 its reverse (21120022002012), we get a palindrome (42140044004124).

The spelling of 21020022002112 in words is "twenty-one trillion, twenty billion, twenty-two million, two thousand, one hundred twelve".