212121034203210 has 32 divisors (see below), whose sum is σ = 555371435005632. Its totient is φ = 51423281018880.

The previous prime is 212121034203209. The next prime is 212121034203217. The reversal of 212121034203210 is 12302430121212.

It is a super-3 number, since 3×212121034203210³ (a number of 44 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (212121034203217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321395506039 + ... + 321395506698.

It is an arithmetic number, because the mean of its divisors is an integer number (17355357343926).

Almost surely, 2^{212121034203210} is an apocalyptic number.

212121034203210 is an abundant number, since it is smaller than the sum of its proper divisors (343250400802422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212121034203210 is a wasteful number, since it uses less digits than its factorization.

212121034203210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642791012758.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 212121034203210 its reverse (12302430121212), we get a palindrome (224423464324422).

The spelling of 212121034203210 in words is "two hundred twelve trillion, one hundred twenty-one billion, thirty-four million, two hundred three thousand, two hundred ten".