1220011111011 has 48 divisors (see below), whose sum is σ = 2108207070720. Its totient is φ = 620287456320.

The previous prime is 1220011111009. The next prime is 1220011111019. The reversal of 1220011111011 is 1101111100221.

It is not a de Polignac number, because 1220011111011 - 2¹ = 1220011111009 is a prime.

It is a super-2 number, since 2×1220011111011² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220011111019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7950496 + ... + 8102493.

It is an arithmetic number, because the mean of its divisors is an integer number (43920980640).

Almost surely, 2^{1220011111011} is an apocalyptic number.

1220011111011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220011111011 is a deficient number, since it is larger than the sum of its proper divisors (888195959709).

1220011111011 is a wasteful number, since it uses less digits than its factorization.

1220011111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16053064 (or 16053057 counting only the distinct ones).

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

Adding to 1220011111011 its reverse (1101111100221), we get a palindrome (2321122211232).

The spelling of 1220011111011 in words is "one trillion, two hundred twenty billion, eleven million, one hundred eleven thousand, eleven".