1111201321 has 4 divisors (see below), whose sum is σ = 1111428432. Its totient is φ = 1110974212.

The previous prime is 1111201319. The next prime is 1111201349. The reversal of 1111201321 is 1231021111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1231021111 = 23 ⋅53522657.

It is a cyclic number.

It is not a de Polignac number, because 1111201321 - 2¹ = 1111201319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111201121) 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, 106051 + ... + 116056.

It is an arithmetic number, because the mean of its divisors is an integer number (277857108).

Almost surely, 2^1111201321 is an apocalyptic number.

It is an amenable number.

1111201321 is a deficient number, since it is larger than the sum of its proper divisors (227111).

1111201321 is an equidigital number, since it uses as much as digits as its factorization.

1111201321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227110.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1111201321 is about 33334.6864542026. The cubic root of 1111201321 is about 1035.7721982026.

Adding to 1111201321 its reverse (1231021111), we get a palindrome (2342222432).

The spelling of 1111201321 in words is "one billion, one hundred eleven million, two hundred one thousand, three hundred twenty-one".