212021310 has 16 divisors (see below), whose sum is σ = 508851216. Its totient is φ = 56539008.

The previous prime is 212021239. The next prime is 212021311. The reversal of 212021310 is 13120212.

It is a super-2 number, since 2×212021310² = 89906071788232200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3533659 + ... + 3533718.

It is an arithmetic number, because the mean of its divisors is an integer number (31803201).

Almost surely, 2^212021310 is an apocalyptic number.

212021310 is an abundant number, since it is smaller than the sum of its proper divisors (296829906).

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

212021310 is a wasteful number, since it uses less digits than its factorization.

212021310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7067387.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 212021310 is about 14560.9515485768. The cubic root of 212021310 is about 596.2931740072.

Adding to 212021310 its reverse (13120212), we get a palindrome (225141522).

The spelling of 212021310 in words is "two hundred twelve million, twenty-one thousand, three hundred ten".