212121211122110 has 64 divisors (see below), whose sum is σ = 386021704795200. Its totient is φ = 83916262656000.

The previous prime is 212121211122103. The next prime is 212121211122113. The reversal of 212121211122110 is 11221112121212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121211122113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3533615576 + ... + 3533675604.

It is an arithmetic number, because the mean of its divisors is an integer number (6031589137425).

Almost surely, 2^{212121211122110} is an apocalyptic number.

212121211122110 is a deficient number, since it is larger than the sum of its proper divisors (173900493673090).

212121211122110 is a wasteful number, since it uses less digits than its factorization.

212121211122110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63917.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 212121211122110 its reverse (11221112121212), we get a palindrome (223342323243322).

The spelling of 212121211122110 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred eleven million, one hundred twenty-two thousand, one hundred ten".