212121022011212 has 6 divisors (see below), whose sum is σ = 371211788519628. Its totient is φ = 106060511005604.

The previous prime is 212121022011211. The next prime is 212121022011247. The reversal of 212121022011212 is 212110220121212.

It is a super-3 number, since 3×212121022011212³ (a number of 44 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (212121022011211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26515127751398 + ... + 26515127751405.

It is an arithmetic number, because the mean of its divisors is an integer number (61868631419938).

Almost surely, 2^{212121022011212} is an apocalyptic number.

It is an amenable number.

212121022011212 is a deficient number, since it is larger than the sum of its proper divisors (159090766508416).

212121022011212 is a wasteful number, since it uses less digits than its factorization.

212121022011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53030255502807 (or 53030255502805 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212121022011212 its reverse (212110220121212), we get a palindrome (424231242132424).

The spelling of 212121022011212 in words is "two hundred twelve trillion, one hundred twenty-one billion, twenty-two million, eleven thousand, two hundred twelve".