1200213212221 has 8 divisors (see below), whose sum is σ = 1229628569400. Its totient is φ = 1170804610560.

The previous prime is 1200213212147. The next prime is 1200213212249. The reversal of 1200213212221 is 1222123120021.

It can be written as a sum of positive squares in 4 ways, for example, as 17804899225 + 1182408312996 = 133435^2 + 1087386^2 .

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 1200213212221 - 2²¹ = 1200211115069 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 (1200213212921) 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, 1328266 + ... + 2040763.

It is an arithmetic number, because the mean of its divisors is an integer number (153703571175).

Almost surely, 2^{1200213212221} is an apocalyptic number.

It is an amenable number.

1200213212221 is a deficient number, since it is larger than the sum of its proper divisors (29415357179).

1200213212221 is an equidigital number, since it uses as much as digits as its factorization.

1200213212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3377759.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1200213212221 its reverse (1222123120021), we get a palindrome (2422336332242).

The spelling of 1200213212221 in words is "one trillion, two hundred billion, two hundred thirteen million, two hundred twelve thousand, two hundred twenty-one".