1220020011221 has 8 divisors (see below), whose sum is σ = 1409220975744. Its totient is φ = 1043867389120.

The previous prime is 1220020011193. The next prime is 1220020011227. The reversal of 1220020011221 is 1221100200221.

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 1220020011221 - 2¹⁰ = 1220020010197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220020011196 and 1220020011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220020011227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3262085405 + ... + 3262085778.

It is an arithmetic number, because the mean of its divisors is an integer number (176152621968).

Almost surely, 2^{1220020011221} is an apocalyptic number.

1220020011221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220020011221 is a deficient number, since it is larger than the sum of its proper divisors (189200964523).

1220020011221 is a wasteful number, since it uses less digits than its factorization.

1220020011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6524171211.

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

Adding to 1220020011221 its reverse (1221100200221), we get a palindrome (2441120211442).

The spelling of 1220020011221 in words is "one trillion, two hundred twenty billion, twenty million, eleven thousand, two hundred twenty-one".