20212021012 has 6 divisors (see below), whose sum is σ = 35371036778. Its totient is φ = 10106010504.

The previous prime is 20212021009. The next prime is 20212021079. The reversal of 20212021012 is 21012021202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12286392336 + 7925628676 = 110844^2 + 89026^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20212020983 and 20212021001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2526502623 + ... + 2526502630.

Almost surely, 2^20212021012 is an apocalyptic number.

It is an amenable number.

20212021012 is a deficient number, since it is larger than the sum of its proper divisors (15159015766).

20212021012 is a wasteful number, since it uses less digits than its factorization.

20212021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5053005257 (or 5053005255 counting only the distinct ones).

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

Adding to 20212021012 its reverse (21012021202), we get a palindrome (41224042214).

The spelling of 20212021012 in words is "twenty billion, two hundred twelve million, twenty-one thousand, twelve".