212121010101212 has 12 divisors (see below), whose sum is σ = 371714084012040. Its totient is φ = 105916986097776.

The previous prime is 212121010101149. The next prime is 212121010101227. The reversal of 212121010101212 is 212101010121212.

212121010101212 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a super-3 number, since 3×212121010101212³ (a number of 44 digits) contains 333 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35879734883 + ... + 35879740794.

It is an arithmetic number, because the mean of its divisors is an integer number (30976173667670).

Almost surely, 2^{212121010101212} is an apocalyptic number.

It is an amenable number.

212121010101212 is a deficient number, since it is larger than the sum of its proper divisors (159593073910828).

212121010101212 is a wasteful number, since it uses less digits than its factorization.

212121010101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71759476420 (or 71759476418 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212121010101212 its reverse (212101010121212), we get a palindrome (424222020222424).

The spelling of 212121010101212 in words is "two hundred twelve trillion, one hundred twenty-one billion, ten million, one hundred one thousand, two hundred twelve".