1200021113311 has 8 divisors (see below), whose sum is σ = 1226012442624. Its totient is φ = 1174048907640.

The previous prime is 1200021113309. The next prime is 1200021113321. The reversal of 1200021113311 is 1133111200021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200021113311 - 2¹ = 1200021113309 is a prime.

It is a super-3 number, since 3×1200021113311³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200021113321) 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 7 ways as a sum of consecutive naturals, for example, 4654015 + ... + 4905088.

It is an arithmetic number, because the mean of its divisors is an integer number (153251555328).

Almost surely, 2^{1200021113311} is an apocalyptic number.

1200021113311 is a deficient number, since it is larger than the sum of its proper divisors (25991329313).

1200021113311 is an equidigital number, since it uses as much as digits as its factorization.

1200021113311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9561821.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1200021113311 its reverse (1133111200021), we get a palindrome (2333132313332).

It can be divided in two parts, 1200021 and 113311, that multiplied together give a palindrome (135975579531).

The spelling of 1200021113311 in words is "one trillion, two hundred billion, twenty-one million, one hundred thirteen thousand, three hundred eleven".