1220221202101 has 8 divisors (see below), whose sum is σ = 1331185641984. Its totient is φ = 1109262635520.

The previous prime is 1220221202027. The next prime is 1220221202119. The reversal of 1220221202101 is 1012021220221.

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 not a de Polignac number, because 1220221202101 - 2⁷ = 1220221201973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220221202171) 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, 1028181 + ... + 1870186.

It is an arithmetic number, because the mean of its divisors is an integer number (166398205248).

Almost surely, 2^{1220221202101} is an apocalyptic number.

1220221202101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220221202101 is a deficient number, since it is larger than the sum of its proper divisors (110964439883).

1220221202101 is a wasteful number, since it uses less digits than its factorization.

1220221202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936651.

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

Adding to 1220221202101 its reverse (1012021220221), we get a palindrome (2232242422322).

The spelling of 1220221202101 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, two hundred two thousand, one hundred one".