1200020210221 has 16 divisors (see below), whose sum is σ = 1418969001600. Its totient is φ = 992962047168.

The previous prime is 1200020210209. The next prime is 1200020210231. The reversal of 1200020210221 is 1220120200021.

It is a happy number.

It is not a de Polignac number, because 1200020210221 - 2⁹ = 1200020209709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200020210231) 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, 816115 + ... + 1751023.

It is an arithmetic number, because the mean of its divisors is an integer number (88685562600).

Almost surely, 2^{1200020210221} is an apocalyptic number.

It is an amenable number.

1200020210221 is a deficient number, since it is larger than the sum of its proper divisors (218948791379).

1200020210221 is an equidigital number, since it uses as much as digits as its factorization.

1200020210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941268.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1200020210221 its reverse (1220120200021), we get a palindrome (2420140410242).

The spelling of 1200020210221 in words is "one trillion, two hundred billion, twenty million, two hundred ten thousand, two hundred twenty-one".