1220111011011 has 16 divisors (see below), whose sum is σ = 1630944844704. Its totient is φ = 811344678144.

The previous prime is 1220111010973. The next prime is 1220111011051. The reversal of 1220111011011 is 1101101110221.

It is not a de Polignac number, because 1220111011011 - 2³⁷ = 1082672057539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220111011051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1721605 + ... + 2324681.

It is an arithmetic number, because the mean of its divisors is an integer number (101934052794).

Almost surely, 2^{1220111011011} is an apocalyptic number.

1220111011011 is a deficient number, since it is larger than the sum of its proper divisors (410833833693).

1220111011011 is a wasteful number, since it uses less digits than its factorization.

1220111011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604790.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1220111011011 its reverse (1101101110221), we get a palindrome (2321212121232).

The spelling of 1220111011011 in words is "one trillion, two hundred twenty billion, one hundred eleven million, eleven thousand, eleven".