1211100222 has 32 divisors (see below), whose sum is σ = 2495688480. Its totient is φ = 391633920.

The previous prime is 1211100211. The next prime is 1211100229. The reversal of 1211100222 is 2220011121.

It is a junction number, because it is equal to n+sod(n) for n = 1211100198 and 1211100207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211100229) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4054 + ... + 49382.

It is an arithmetic number, because the mean of its divisors is an integer number (77990265).

Almost surely, 2^1211100222 is an apocalyptic number.

1211100222 is an abundant number, since it is smaller than the sum of its proper divisors (1284588258).

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

1211100222 is a wasteful number, since it uses less digits than its factorization.

1211100222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45468.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1211100222 is about 34800.8652478642. The cubic root of 1211100222 is about 1065.9251138629.

Adding to 1211100222 its reverse (2220011121), we get a palindrome (3431111343).

The spelling of 1211100222 in words is "one billion, two hundred eleven million, one hundred thousand, two hundred twenty-two".