1220111444105 has 32 divisors (see below), whose sum is σ = 1551474812160. Its totient is φ = 918558869760.

The previous prime is 1220111444033. The next prime is 1220111444107. The reversal of 1220111444105 is 5014441110221.

It is a happy number.

It is not a de Polignac number, because 1220111444105 - 2⁸ = 1220111443849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220111444107) 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, 15211967 + ... + 15291963.

It is an arithmetic number, because the mean of its divisors is an integer number (48483587880).

Almost surely, 2^{1220111444105} is an apocalyptic number.

It is an amenable number.

1220111444105 is a deficient number, since it is larger than the sum of its proper divisors (331363368055).

1220111444105 is a wasteful number, since it uses less digits than its factorization.

1220111444105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81089.

The product of its (nonzero) digits is 1280, while the sum is 26.

Adding to 1220111444105 its reverse (5014441110221), we get a palindrome (6234552554326).

The spelling of 1220111444105 in words is "one trillion, two hundred twenty billion, one hundred eleven million, four hundred forty-four thousand, one hundred five".