21212202102212 has 24 divisors (see below), whose sum is σ = 40496822583840. Its totient is φ = 9641719477760.

The previous prime is 21212202102121. The next prime is 21212202102251. The reversal of 21212202102212 is 21220120221212.

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 7 ways as a sum of consecutive naturals, for example, 2500637 + ... + 6976932.

It is an arithmetic number, because the mean of its divisors is an integer number (1687367607660).

Almost surely, 2^{21212202102212} is an apocalyptic number.

21212202102212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21212202102212 is a deficient number, since it is larger than the sum of its proper divisors (19284620481628).

21212202102212 is a wasteful number, since it uses less digits than its factorization.

21212202102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9528451 (or 9528449 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21212202102212 its reverse (21220120221212), we get a palindrome (42432322323424).

The spelling of 21212202102212 in words is "twenty-one trillion, two hundred twelve billion, two hundred two million, one hundred two thousand, two hundred twelve".