20011021112 has 32 divisors (see below), whose sum is σ = 38494790400. Its totient is φ = 9746974944.

The previous prime is 20011021109. The next prime is 20011021153. The reversal of 20011021112 is 21112011002.

It is a junction number, because it is equal to n+sod(n) for n = 20011021093 and 20011021102.

It is a congruent number.

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, 53633 + ... + 207119.

It is an arithmetic number, because the mean of its divisors is an integer number (1202962200).

Almost surely, 2^20011021112 is an apocalyptic number.

It is an amenable number.

20011021112 is a deficient number, since it is larger than the sum of its proper divisors (18483769288).

20011021112 is a wasteful number, since it uses less digits than its factorization.

20011021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153915 (or 153911 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20011021112 its reverse (21112011002), we get a palindrome (41123032114).

The spelling of 20011021112 in words is "twenty billion, eleven million, twenty-one thousand, one hundred twelve".