1220001011211 has 8 divisors (see below), whose sum is σ = 1670632015504. Its totient is φ = 791352007200.

The previous prime is 1220001011189. The next prime is 1220001011297. The reversal of 1220001011211 is 1121101000221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220001011211 - 2²³ = 1219992622603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220001011111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5495499940 + ... + 5495500161.

It is an arithmetic number, because the mean of its divisors is an integer number (208829001938).

Almost surely, 2^{1220001011211} is an apocalyptic number.

1220001011211 is a deficient number, since it is larger than the sum of its proper divisors (450631004293).

1220001011211 is a wasteful number, since it uses less digits than its factorization.

1220001011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10991000141.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1220001011211 its reverse (1121101000221), we get a palindrome (2341102011432).

It can be divided in two parts, 12200010 and 11211, that added together give a palindrome (12211221).

The spelling of 1220001011211 in words is "one trillion, two hundred twenty billion, one million, eleven thousand, two hundred eleven".