20021120012 has 6 divisors (see below), whose sum is σ = 35036960028. Its totient is φ = 10010560004.

The previous prime is 20021119973. The next prime is 20021120027. The reversal of 20021120012 is 21002112002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20021119975 and 20021120002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2502639998 + ... + 2502640005.

It is an arithmetic number, because the mean of its divisors is an integer number (5839493338).

Almost surely, 2^20021120012 is an apocalyptic number.

It is an amenable number.

20021120012 is a deficient number, since it is larger than the sum of its proper divisors (15015840016).

20021120012 is a wasteful number, since it uses less digits than its factorization.

20021120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005280007 (or 5005280005 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20021120012 its reverse (21002112002), we get a palindrome (41023232014).

The spelling of 20021120012 in words is "twenty billion, twenty-one million, one hundred twenty thousand, twelve".