212121030110 has 32 divisors (see below), whose sum is σ = 416626610400. Its totient is φ = 77116764160.

The previous prime is 212121030089. The next prime is 212121030113. The reversal of 212121030110 is 11030121212.

It is a super-3 number, since 3×212121030110³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121030113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246986 + ... + 696594.

It is an arithmetic number, because the mean of its divisors is an integer number (13019581575).

Almost surely, 2^212121030110 is an apocalyptic number.

212121030110 is a deficient number, since it is larger than the sum of its proper divisors (204505580290).

212121030110 is a wasteful number, since it uses less digits than its factorization.

212121030110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453916.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 212121030110 its reverse (11030121212), we get a palindrome (223151151322).

The spelling of 212121030110 in words is "two hundred twelve billion, one hundred twenty-one million, thirty thousand, one hundred ten".