1201221200221 has 8 divisors (see below), whose sum is σ = 1372887996480. Its totient is φ = 1029570345888.

The previous prime is 1201221200167. The next prime is 1201221200243. The reversal of 1201221200221 is 1220021221021.

It is a happy number.

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

It is not a de Polignac number, because 1201221200221 - 2⁷ = 1201221200093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201221200195 and 1201221200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201221206221) 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, 3823576 + ... + 4125793.

It is an arithmetic number, because the mean of its divisors is an integer number (171610999560).

Almost surely, 2^{1201221200221} is an apocalyptic number.

It is an amenable number.

1201221200221 is a deficient number, since it is larger than the sum of its proper divisors (171666796259).

1201221200221 is an equidigital number, since it uses as much as digits as its factorization.

1201221200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7970963.

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

Adding to 1201221200221 its reverse (1220021221021), we get a palindrome (2421242421242).

The spelling of 1201221200221 in words is "one trillion, two hundred one billion, two hundred twenty-one million, two hundred thousand, two hundred twenty-one".