1211101111222 has 16 divisors (see below), whose sum is σ = 1824780849840. Its totient is φ = 602841197728.

The previous prime is 1211101111217. The next prime is 1211101111247. The reversal of 1211101111222 is 2221111011121.

It is a junction number, because it is equal to n+sod(n) for n = 1211101111196 and 1211101111205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7087404 + ... + 7256272.

It is an arithmetic number, because the mean of its divisors is an integer number (114048803115).

Almost surely, 2^{1211101111222} is an apocalyptic number.

1211101111222 is a deficient number, since it is larger than the sum of its proper divisors (613679738618).

1211101111222 is a wasteful number, since it uses less digits than its factorization.

1211101111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184895.

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

Adding to 1211101111222 its reverse (2221111011121), we get a palindrome (3432212122343).

The spelling of 1211101111222 in words is "one trillion, two hundred eleven billion, one hundred one million, one hundred eleven thousand, two hundred twenty-two".