1111011220201 has 4 divisors (see below), whose sum is σ = 1111021830100. Its totient is φ = 1111000610304.

The previous prime is 1111011220171. The next prime is 1111011220219. The reversal of 1111011220201 is 1020221101111.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 838552275625 + 272458944576 = 915725^2 + 521976^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111011220201 - 2⁷ = 1111011220073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111011220601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5146296 + ... + 5357833.

It is an arithmetic number, because the mean of its divisors is an integer number (277755457525).

Almost surely, 2^{1111011220201} is an apocalyptic number.

It is an amenable number.

1111011220201 is a deficient number, since it is larger than the sum of its proper divisors (10609899).

1111011220201 is a wasteful number, since it uses less digits than its factorization.

1111011220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10609898.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1111011220201 its reverse (1020221101111), we get a palindrome (2131232321312).

The spelling of 1111011220201 in words is "one trillion, one hundred eleven billion, eleven million, two hundred twenty thousand, two hundred one".