1200221120221 has 4 divisors (see below), whose sum is σ = 1218134868352. Its totient is φ = 1182307372092.

The previous prime is 1200221120177. The next prime is 1200221120269. The reversal of 1200221120221 is 1220211220021.

It is a happy number.

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 1200221120221 - 2²⁷ = 1200086902493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200221120195 and 1200221120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200221120321) 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, 8956873965 + ... + 8956874098.

It is an arithmetic number, because the mean of its divisors is an integer number (304533717088).

Almost surely, 2^{1200221120221} is an apocalyptic number.

It is an amenable number.

1200221120221 is a deficient number, since it is larger than the sum of its proper divisors (17913748131).

1200221120221 is an equidigital number, since it uses as much as digits as its factorization.

1200221120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17913748130.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1200221120221 its reverse (1220211220021), we get a palindrome (2420432340242).

The spelling of 1200221120221 in words is "one trillion, two hundred billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twenty-one".