20221021012 has 6 divisors (see below), whose sum is σ = 35386786778. Its totient is φ = 10110510504.

The previous prime is 20221021001. The next prime is 20221021027. The reversal of 20221021012 is 21012012202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16292990736 + 3928030276 = 127644^2 + 62674^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20221020983 and 20221021001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2527627623 + ... + 2527627630.

Almost surely, 2^20221021012 is an apocalyptic number.

It is an amenable number.

20221021012 is a deficient number, since it is larger than the sum of its proper divisors (15165765766).

20221021012 is a wasteful number, since it uses less digits than its factorization.

20221021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5055255257 (or 5055255255 counting only the distinct ones).

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

Adding to 20221021012 its reverse (21012012202), we get a palindrome (41233033214).

The spelling of 20221021012 in words is "twenty billion, two hundred twenty-one million, twenty-one thousand, twelve".