212121021110 has 16 divisors (see below), whose sum is σ = 384024880656. Its totient is φ = 84357954528.

The previous prime is 212121021061. The next prime is 212121021113. The reversal of 212121021110 is 11120121212.

It is a super-3 number, since 3×212121021110³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121021113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61304924 + ... + 61308383.

It is an arithmetic number, because the mean of its divisors is an integer number (24001555041).

Almost surely, 2^212121021110 is an apocalyptic number.

212121021110 is a deficient number, since it is larger than the sum of its proper divisors (171903859546).

212121021110 is a wasteful number, since it uses less digits than its factorization.

212121021110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122613487.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212121021110 its reverse (11120121212), we get a palindrome (223241142322).

The spelling of 212121021110 in words is "two hundred twelve billion, one hundred twenty-one million, twenty-one thousand, one hundred ten".