1220201122211 has 4 divisors (see below), whose sum is σ = 1232047735152. Its totient is φ = 1208354509272.

The previous prime is 1220201122171. The next prime is 1220201122219. The reversal of 1220201122211 is 1122211020221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220201122211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220201122211.

It is not an unprimeable number, because it can be changed into a prime (1220201122219) 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 3 ways as a sum of consecutive naturals, for example, 5923306316 + ... + 5923306521.

It is an arithmetic number, because the mean of its divisors is an integer number (308011933788).

Almost surely, 2^{1220201122211} is an apocalyptic number.

1220201122211 is a deficient number, since it is larger than the sum of its proper divisors (11846612941).

1220201122211 is a wasteful number, since it uses less digits than its factorization.

1220201122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11846612940.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1220201122211 its reverse (1122211020221), we get a palindrome (2342412142432).

The spelling of 1220201122211 in words is "one trillion, two hundred twenty billion, two hundred one million, one hundred twenty-two thousand, two hundred eleven".