1200220101221 has 4 divisors (see below), whose sum is σ = 1200222853152. Its totient is φ = 1200217349292.

The previous prime is 1200220101163. The next prime is 1200220101257. The reversal of 1200220101221 is 1221010220021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1200220101221 - 2³⁴ = 1183040232037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200220101196 and 1200220101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200220101281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560771 + ... + 1647696.

It is an arithmetic number, because the mean of its divisors is an integer number (300055713288).

Almost surely, 2^{1200220101221} is an apocalyptic number.

It is an amenable number.

1200220101221 is a deficient number, since it is larger than the sum of its proper divisors (2751931).

1200220101221 is an equidigital number, since it uses as much as digits as its factorization.

1200220101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2751930.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1200220101221 its reverse (1221010220021), we get a palindrome (2421230321242).

The spelling of 1200220101221 in words is "one trillion, two hundred billion, two hundred twenty million, one hundred one thousand, two hundred twenty-one".