1220000010221 has 8 divisors (see below), whose sum is σ = 1234677178560. Its totient is φ = 1205365696128.

The previous prime is 1220000010161. The next prime is 1220000010239. The reversal of 1220000010221 is 1220100000221.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220000010221 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 (1220000010821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10656281 + ... + 10770158.

It is an arithmetic number, because the mean of its divisors is an integer number (154334647320).

Almost surely, 2^{1220000010221} is an apocalyptic number.

It is an amenable number.

1220000010221 is a deficient number, since it is larger than the sum of its proper divisors (14677168339).

1220000010221 is an equidigital number, since it uses as much as digits as its factorization.

1220000010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21427123.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1220000010221 its reverse (1220100000221), we get a palindrome (2440100010442).

The spelling of 1220000010221 in words is "one trillion, two hundred twenty billion, ten thousand, two hundred twenty-one".