1220011102111 has 4 divisors (see below), whose sum is σ = 1220019299352. Its totient is φ = 1220002904872.

The previous prime is 1220011102097. The next prime is 1220011102139. The reversal of 1220011102111 is 1112011100221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1220011102111 - 2¹⁹ = 1220010577823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220011102091 and 1220011102100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220011102811) 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, 3871165 + ... + 4174438.

It is an arithmetic number, because the mean of its divisors is an integer number (305004824838).

Almost surely, 2^{1220011102111} is an apocalyptic number.

1220011102111 is a deficient number, since it is larger than the sum of its proper divisors (8197241).

1220011102111 is an equidigital number, since it uses as much as digits as its factorization.

1220011102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8197240.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1220011102111 its reverse (1112011100221), we get a palindrome (2332022202332).

The spelling of 1220011102111 in words is "one trillion, two hundred twenty billion, eleven million, one hundred two thousand, one hundred eleven".