1220121220201 has 8 divisors (see below), whose sum is σ = 1314371214464. Its totient is φ = 1125927585360.

The previous prime is 1220121220189. The next prime is 1220121220229. The reversal of 1220121220201 is 1020221210221.

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 1220121220201 - 2¹⁷ = 1220121089129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220121220231) 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, 14044881 + ... + 14131486.

It is an arithmetic number, because the mean of its divisors is an integer number (164296401808).

Almost surely, 2^{1220121220201} is an apocalyptic number.

It is an amenable number.

1220121220201 is a deficient number, since it is larger than the sum of its proper divisors (94249994263).

1220121220201 is a wasteful number, since it uses less digits than its factorization.

1220121220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28179711.

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

Adding to 1220121220201 its reverse (1020221210221), we get a palindrome (2240342430422).

The spelling of 1220121220201 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twenty thousand, two hundred one".