1220111011112 has 64 divisors (see below), whose sum is σ = 2646723703680. Its totient is φ = 516468033792.

The previous prime is 1220111011051. The next prime is 1220111011121. The reversal of 1220111011112 is 2111101110221.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18619718 + ... + 18685130.

It is an arithmetic number, because the mean of its divisors is an integer number (41355057870).

Almost surely, 2^{1220111011112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220111011112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1323361851840).

1220111011112 is an abundant number, since it is smaller than the sum of its proper divisors (1426612692568).

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

1220111011112 is a wasteful number, since it uses less digits than its factorization.

1220111011112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69522 (or 69518 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1220111011112 its reverse (2111101110221), we get a palindrome (3331212121333).

The spelling of 1220111011112 in words is "one trillion, two hundred twenty billion, one hundred eleven million, eleven thousand, one hundred twelve".