212121022010 has 8 divisors (see below), whose sum is σ = 381817839636. Its totient is φ = 84848408800.

The previous prime is 212121021977. The next prime is 212121022021. The reversal of 212121022010 is 10220121212.

It can be written as a sum of positive squares in 2 ways, for example, as 207962448841 + 4158573169 = 456029^2 + 64487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×212121022010³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10606051091 + ... + 10606051110.

Almost surely, 2^212121022010 is an apocalyptic number.

212121022010 is a deficient number, since it is larger than the sum of its proper divisors (169696817626).

212121022010 is a wasteful number, since it uses less digits than its factorization.

212121022010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21212102208.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212121022010 its reverse (10220121212), we get a palindrome (222341143222).

The spelling of 212121022010 in words is "two hundred twelve billion, one hundred twenty-one million, twenty-two thousand, ten".