211212101211222 has 16 divisors (see below), whose sum is σ = 444657055181760. Its totient is φ = 66698558277192.

The previous prime is 211212101211217. The next prime is 211212101211271. The reversal of 211212101211222 is 222112101212112.

It is a super-2 number, since 2×211212101211222² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 926368864848 + ... + 926368865075.

It is an arithmetic number, because the mean of its divisors is an integer number (27791065948860).

Almost surely, 2^{211212101211222} is an apocalyptic number.

211212101211222 is an abundant number, since it is smaller than the sum of its proper divisors (233444953970538).

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

211212101211222 is a wasteful number, since it uses less digits than its factorization.

211212101211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852737729947.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 211212101211222 its reverse (222112101212112), we get a palindrome (433324202423334).

The spelling of 211212101211222 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred one million, two hundred eleven thousand, two hundred twenty-two".