1220012012111 has 4 divisors (see below), whose sum is σ = 1220111935224. Its totient is φ = 1219912089000.

The previous prime is 1220012012101. The next prime is 1220012012179. The reversal of 1220012012111 is 1112102100221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220012012111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220012012101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49943240 + ... + 49967661.

It is an arithmetic number, because the mean of its divisors is an integer number (305027983806).

Almost surely, 2^{1220012012111} is an apocalyptic number.

1220012012111 is a deficient number, since it is larger than the sum of its proper divisors (99923113).

1220012012111 is an equidigital number, since it uses as much as digits as its factorization.

1220012012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99923112.

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

Adding to 1220012012111 its reverse (1112102100221), we get a palindrome (2332114112332).

The spelling of 1220012012111 in words is "one trillion, two hundred twenty billion, twelve million, twelve thousand, one hundred eleven".