1200221122211 has 16 divisors (see below), whose sum is σ = 1279053877248. Its totient is φ = 1122317596800.

The previous prime is 1200221122201. The next prime is 1200221122241. The reversal of 1200221122211 is 1122211220021.

It is not a de Polignac number, because 1200221122211 - 2³⁴ = 1183041253027 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200221122211.

It is not an unprimeable number, because it can be changed into a prime (1200221122201) 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, 2405426 + ... + 2861208.

It is an arithmetic number, because the mean of its divisors is an integer number (79940867328).

Almost surely, 2^{1200221122211} is an apocalyptic number.

1200221122211 is a deficient number, since it is larger than the sum of its proper divisors (78832755037).

1200221122211 is a wasteful number, since it uses less digits than its factorization.

1200221122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456802.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1200221122211 its reverse (1122211220021), we get a palindrome (2322432342232).

The spelling of 1200221122211 in words is "one trillion, two hundred billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred eleven".