212121211010 has 32 divisors (see below), whose sum is σ = 398037279744. Its totient is φ = 81298440000.

The previous prime is 212121211009. The next prime is 212121211019. The reversal of 212121211010 is 10112121212.

It is not an unprimeable number, because it can be changed into a prime (212121211019) 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, 3356126 + ... + 3418745.

It is an arithmetic number, because the mean of its divisors is an integer number (12438664992).

Almost surely, 2^212121211010 is an apocalyptic number.

212121211010 is a deficient number, since it is larger than the sum of its proper divisors (185916068734).

212121211010 is a wasteful number, since it uses less digits than its factorization.

212121211010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6775010.

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

Adding to 212121211010 its reverse (10112121212), we get a palindrome (222233332222).

The spelling of 212121211010 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred eleven thousand, ten".