1111211201 has 4 divisors (see below), whose sum is σ = 1111368132. Its totient is φ = 1111054272.

The previous prime is 1111211173. The next prime is 1111211207. The reversal of 1111211201 is 1021121111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1021121111 = 1321 ⋅772991.

It can be written as a sum of positive squares in 2 ways, for example, as 117700801 + 993510400 = 10849^2 + 31520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111211201 - 2²⁶ = 1044102337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111211207) 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, 67316 + ... + 82181.

It is an arithmetic number, because the mean of its divisors is an integer number (277842033).

Almost surely, 2^1111211201 is an apocalyptic number.

It is an amenable number.

1111211201 is a deficient number, since it is larger than the sum of its proper divisors (156931).

1111211201 is an equidigital number, since it uses as much as digits as its factorization.

1111211201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156930.

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 1111211201 is about 33334.8346478575. The cubic root of 1111211201 is about 1035.7752679731.

Adding to 1111211201 its reverse (1021121111), we get a palindrome (2132332312).

The spelling of 1111211201 in words is "one billion, one hundred eleven million, two hundred eleven thousand, two hundred one".