1200021221211 has 8 divisors (see below), whose sum is σ = 1622563905024. Its totient is φ = 788746342440.

The previous prime is 1200021221209. The next prime is 1200021221213. The reversal of 1200021221211 is 1121221200021.

It is an interprime number because it is at equal distance from previous prime (1200021221209) and next prime (1200021221213).

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

It is not a de Polignac number, because 1200021221211 - 2¹ = 1200021221209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200021221213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2816951011 + ... + 2816951436.

It is an arithmetic number, because the mean of its divisors is an integer number (202820488128).

Almost surely, 2^{1200021221211} is an apocalyptic number.

1200021221211 is a deficient number, since it is larger than the sum of its proper divisors (422542683813).

1200021221211 is an equidigital number, since it uses as much as digits as its factorization.

1200021221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5633902521.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1200021221211 its reverse (1121221200021), we get a palindrome (2321242421232).

The spelling of 1200021221211 in words is "one trillion, two hundred billion, twenty-one million, two hundred twenty-one thousand, two hundred eleven".