1211022222222 has 16 divisors (see below), whose sum is σ = 2452703235840. Its totient is φ = 398564275512.

The previous prime is 1211022222197. The next prime is 1211022222227. The reversal of 1211022222222 is 2222222201121.

It is a super-2 number, since 2×1211022222222² (a number of 25 digits) contains 22 as substring.

1211022222222 is a modest number, since divided by 2222222 gives 121102 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211022222227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1277449128 + ... + 1277450075.

It is an arithmetic number, because the mean of its divisors is an integer number (153293952240).

Almost surely, 2^{1211022222222} is an apocalyptic number.

1211022222222 is an abundant number, since it is smaller than the sum of its proper divisors (1241681013618).

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

1211022222222 is a wasteful number, since it uses less digits than its factorization.

1211022222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554899287.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 1211022222222 its reverse (2222222201121), we get a palindrome (3433244423343).

The spelling of 1211022222222 in words is "one trillion, two hundred eleven billion, twenty-two million, two hundred twenty-two thousand, two hundred twenty-two".