1211110001222 has 16 divisors (see below), whose sum is σ = 1981911730752. Its totient is φ = 550478055720.

The previous prime is 1211110001201. The next prime is 1211110001239. The reversal of 1211110001222 is 2221000111121.

It is a junction number, because it is equal to n+sod(n) for n = 1211110001197 and 1211110001206.

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, 853208 + ... + 1774875.

It is an arithmetic number, because the mean of its divisors is an integer number (123869483172).

Almost surely, 2^{1211110001222} is an apocalyptic number.

1211110001222 is a deficient number, since it is larger than the sum of its proper divisors (770801729530).

1211110001222 is a wasteful number, since it uses less digits than its factorization.

1211110001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2649043.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211110001222 its reverse (2221000111121), we get a palindrome (3432110112343).

The spelling of 1211110001222 in words is "one trillion, two hundred eleven billion, one hundred ten million, one thousand, two hundred twenty-two".