1211111110122 has 64 divisors (see below), whose sum is σ = 2558336563200. Its totient is φ = 381729547584.

The previous prime is 1211111110093. The next prime is 1211111110123. The reversal of 1211111110122 is 2210111111121.

It is not an unprimeable number, because it can be changed into a prime (1211111110123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1580883 + ... + 2218425.

It is an arithmetic number, because the mean of its divisors is an integer number (39974008800).

Almost surely, 2^{1211111110122} is an apocalyptic number.

1211111110122 is an abundant number, since it is smaller than the sum of its proper divisors (1347225453078).

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

1211111110122 is a wasteful number, since it uses less digits than its factorization.

1211111110122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637827.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1211111110122 its reverse (2210111111121), we get a palindrome (3421222221243).

Subtracting 1211111110122 from its reverse (2210111111121), we obtain a palindrome (999000000999).

The spelling of 1211111110122 in words is "one trillion, two hundred eleven billion, one hundred eleven million, one hundred ten thousand, one hundred twenty-two".