20021000212 has 12 divisors (see below), whose sum is σ = 35048572020. Its totient is φ = 10007122496.

The previous prime is 20021000201. The next prime is 20021000267. The reversal of 20021000212 is 21200012002.

It can be written as a sum of positive squares in 2 ways, for example, as 8034253956 + 11986746256 = 89634^2 + 109484^2 .

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, 831043 + ... + 854794.

It is an arithmetic number, because the mean of its divisors is an integer number (2920714335).

Almost surely, 2^20021000212 is an apocalyptic number.

It is an amenable number.

20021000212 is a deficient number, since it is larger than the sum of its proper divisors (15027571808).

20021000212 is a wasteful number, since it uses less digits than its factorization.

20021000212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688810 (or 1688808 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20021000212 its reverse (21200012002), we get a palindrome (41221012214).

The spelling of 20021000212 in words is "twenty billion, twenty-one million, two hundred twelve", and thus it is an aban number.