21212120200010 has 32 divisors (see below), whose sum is σ = 40145946008400. Its totient is φ = 8057967644160.

The previous prime is 21212120199971. The next prime is 21212120200049. The reversal of 21212120200010 is 1000202121212.

It is an interprime number because it is at equal distance from previous prime (21212120199971) and next prime (21212120200049).

It can be written as a sum of positive squares in 8 ways, for example, as 4851785966329 + 16360334233681 = 2202677^2 + 4044791^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 599533475 + ... + 599568854.

Almost surely, 2^{21212120200010} is an apocalyptic number.

21212120200010 is a deficient number, since it is larger than the sum of its proper divisors (18933825808390).

21212120200010 is a wasteful number, since it uses less digits than its factorization.

21212120200010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199102426.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21212120200010 its reverse (1000202121212), we get a palindrome (22212322321222).

The spelling of 21212120200010 in words is "twenty-one trillion, two hundred twelve billion, one hundred twenty million, two hundred thousand, ten".