1220201211211 has 8 divisors (see below), whose sum is σ = 1232407533600. Its totient is φ = 1207997342400.

The previous prime is 1220201211169. The next prime is 1220201211217. The reversal of 1220201211211 is 1121121020221.

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 1220201211211 - 2⁷ = 1220201211083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220201211217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394450 + ... + 1611208.

It is an arithmetic number, because the mean of its divisors is an integer number (154050941700).

Almost surely, 2^{1220201211211} is an apocalyptic number.

1220201211211 is a deficient number, since it is larger than the sum of its proper divisors (12206322389).

1220201211211 is a wasteful number, since it uses less digits than its factorization.

1220201211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226789.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1220201211211 its reverse (1121121020221), we get a palindrome (2341322231432).

The spelling of 1220201211211 in words is "one trillion, two hundred twenty billion, two hundred one million, two hundred eleven thousand, two hundred eleven".