2211221012212 has 12 divisors (see below), whose sum is σ = 3869690121220. Its totient is φ = 1105595263296.

The previous prime is 2211221012179. The next prime is 2211221012243. The reversal of 2211221012212 is 2122101221122.

It can be written as a sum of positive squares in 2 ways, for example, as 1619296970256 + 591924041956 = 1272516^2 + 769366^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2211221012212.

It is a congruent number.

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, 3481137 + ... + 4067032.

Almost surely, 2^{2211221012212} is an apocalyptic number.

It is an amenable number.

2211221012212 is a deficient number, since it is larger than the sum of its proper divisors (1658469109008).

2211221012212 is a wasteful number, since it uses less digits than its factorization.

2211221012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7621410 (or 7621408 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2211221012212 its reverse (2122101221122), we get a palindrome (4333322233334).

The spelling of 2211221012212 in words is "two trillion, two hundred eleven billion, two hundred twenty-one million, twelve thousand, two hundred twelve".