1200011220111 has 32 divisors (see below), whose sum is σ = 1880066580480. Its totient is φ = 672978348000.

The previous prime is 1200011220097. The next prime is 1200011220113. The reversal of 1200011220111 is 1110221100021.

It is not a de Polignac number, because 1200011220111 - 2¹⁵ = 1200011187343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200011220113) 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, 22227615 + ... + 22281536.

It is an arithmetic number, because the mean of its divisors is an integer number (58752080640).

Almost surely, 2^{1200011220111} is an apocalyptic number.

1200011220111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1200011220111 is a deficient number, since it is larger than the sum of its proper divisors (680055360369).

1200011220111 is a wasteful number, since it uses less digits than its factorization.

1200011220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44509227.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1200011220111 its reverse (1110221100021), we get a palindrome (2310232320132).

The spelling of 1200011220111 in words is "one trillion, two hundred billion, eleven million, two hundred twenty thousand, one hundred eleven".