1200021102011 has 16 divisors (see below), whose sum is σ = 1271692074240. Its totient is φ = 1129222775520.

The previous prime is 1200021101987. The next prime is 1200021102023. The reversal of 1200021102011 is 1102011200021.

It is a cyclic number.

It is not a de Polignac number, because 1200021102011 - 2⁶ = 1200021101947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200021101983 and 1200021102001.

It is not an unprimeable number, because it can be changed into a prime (1200021902011) 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, 1718981 + ... + 2314073.

It is an arithmetic number, because the mean of its divisors is an integer number (79480754640).

Almost surely, 2^{1200021102011} is an apocalyptic number.

1200021102011 is a deficient number, since it is larger than the sum of its proper divisors (71670972229).

1200021102011 is a wasteful number, since it uses less digits than its factorization.

1200021102011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595826.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1200021102011 its reverse (1102011200021), we get a palindrome (2302032302032).

The spelling of 1200021102011 in words is "one trillion, two hundred billion, twenty-one million, one hundred two thousand, eleven".