20012221012 has 12 divisors (see below), whose sum is σ = 40024442080. Its totient is φ = 8576666136.

The previous prime is 20012220983. The next prime is 20012221063. The reversal of 20012221012 is 21012221002.

It is a happy number.

20012221012 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 20012220983 and 20012221001.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 357361062 + ... + 357361117.

Almost surely, 2^20012221012 is an apocalyptic number.

It is an amenable number.

20012221012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20012221012 is a wasteful number, since it uses less digits than its factorization.

20012221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714722190 (or 714722188 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20012221012 its reverse (21012221002), we get a palindrome (41024442014).

The spelling of 20012221012 in words is "twenty billion, twelve million, two hundred twenty-one thousand, twelve".