1211220110112 has 96 divisors (see below), whose sum is σ = 3389157273600. Its totient is φ = 377648863488.

The previous prime is 1211220110069. The next prime is 1211220110129. The reversal of 1211220110112 is 2110110221121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 1211220110091 and 1211220110100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4058728 + ... + 4346919.

It is an arithmetic number, because the mean of its divisors is an integer number (35303721600).

Almost surely, 2^{1211220110112} is an apocalyptic number.

1211220110112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211220110112 is an abundant number, since it is smaller than the sum of its proper divisors (2177937163488).

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

1211220110112 is a wasteful number, since it uses less digits than its factorization.

1211220110112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8405758 (or 8405750 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1211220110112 its reverse (2110110221121), we get a palindrome (3321330331233).

The spelling of 1211220110112 in words is "one trillion, two hundred eleven billion, two hundred twenty million, one hundred ten thousand, one hundred twelve".