20211000212 has 24 divisors (see below), whose sum is σ = 38095027656. Its totient is φ = 9326913408.

The previous prime is 20211000211. The next prime is 20211000221. The reversal of 20211000212 is 21200011202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8331308176 + 11879692036 = 91276^2 + 108994^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20211000193 and 20211000202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211000211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453638 + ... + 496194.

It is an arithmetic number, because the mean of its divisors is an integer number (1587292819).

Almost surely, 2^20211000212 is an apocalyptic number.

It is an amenable number.

20211000212 is a deficient number, since it is larger than the sum of its proper divisors (17884027444).

20211000212 is a wasteful number, since it uses less digits than its factorization.

20211000212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51707 (or 51705 counting only the distinct ones).

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

Adding to 20211000212 its reverse (21200011202), we get a palindrome (41411011414).

The spelling of 20211000212 in words is "twenty billion, two hundred eleven million, two hundred twelve", and thus it is an aban number.