211221211120210 has 32 divisors (see below), whose sum is σ = 396824527906560. Its totient is φ = 80795518106688.

The previous prime is 211221211120109. The next prime is 211221211120217. The reversal of 211221211120210 is 12021112122112.

It is a happy number.

It is a super-2 number, since 2×211221211120210² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221211120217) 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, 110149470 + ... + 112050649.

It is an arithmetic number, because the mean of its divisors is an integer number (12400766497080).

Almost surely, 2^{211221211120210} is an apocalyptic number.

211221211120210 is a deficient number, since it is larger than the sum of its proper divisors (185603316786350).

211221211120210 is a wasteful number, since it uses less digits than its factorization.

211221211120210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222204282.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211221211120210 its reverse (12021112122112), we get a palindrome (223242323242322).

The spelling of 211221211120210 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred eleven million, one hundred twenty thousand, two hundred ten".