1200021220111 has 16 divisors (see below), whose sum is σ = 1437385572864. Its totient is φ = 979534077984.

The previous prime is 1200021220091. The next prime is 1200021220147. The reversal of 1200021220111 is 1110221200021.

It is not a de Polignac number, because 1200021220111 - 2²³ = 1200012831503 is a prime.

It is a super-2 number, since 2×1200021220111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200021220091 and 1200021220100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200021220511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16380960 + ... + 16454053.

It is an arithmetic number, because the mean of its divisors is an integer number (89836598304).

Almost surely, 2^{1200021220111} is an apocalyptic number.

1200021220111 is a deficient number, since it is larger than the sum of its proper divisors (237364352753).

1200021220111 is a wasteful number, since it uses less digits than its factorization.

1200021220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32835270.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1200021220111 its reverse (1110221200021), we get a palindrome (2310242420132).

The spelling of 1200021220111 in words is "one trillion, two hundred billion, twenty-one million, two hundred twenty thousand, one hundred eleven".