212121012110 has 16 divisors (see below), whose sum is σ = 436363225056. Its totient is φ = 72727204128.

The previous prime is 212121012109. The next prime is 212121012113. The reversal of 212121012110 is 11210121212.

It is a super-3 number, since 3×212121012110³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121012113) 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, 1515150017 + ... + 1515150156.

It is an arithmetic number, because the mean of its divisors is an integer number (27272701566).

Almost surely, 2^212121012110 is an apocalyptic number.

212121012110 is an abundant number, since it is smaller than the sum of its proper divisors (224242212946).

212121012110 is a wasteful number, since it uses less digits than its factorization.

212121012110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030300187.

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

Adding to 212121012110 its reverse (11210121212), we get a palindrome (223331133322).

The spelling of 212121012110 in words is "two hundred twelve billion, one hundred twenty-one million, twelve thousand, one hundred ten".