221212010210 has 8 divisors (see below), whose sum is σ = 398181618396. Its totient is φ = 88484804080.

The previous prime is 221212010171. The next prime is 221212010221. The reversal of 221212010210 is 12010212122.

It can be written as a sum of positive squares in 2 ways, for example, as 178481745841 + 42730264369 = 422471^2 + 206713^2 .

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

It is a super-2 number, since 2×221212010210² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11060600501 + ... + 11060600520.

Almost surely, 2^221212010210 is an apocalyptic number.

221212010210 is a deficient number, since it is larger than the sum of its proper divisors (176969608186).

221212010210 is a wasteful number, since it uses less digits than its factorization.

221212010210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22121201028.

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

Adding to 221212010210 its reverse (12010212122), we get a palindrome (233222222332).

The spelling of 221212010210 in words is "two hundred twenty-one billion, two hundred twelve million, ten thousand, two hundred ten".