1321112011 has 8 divisors (see below), whose sum is σ = 1346632560. Its totient is φ = 1295695872.

The previous prime is 1321112003. The next prime is 1321112021. The reversal of 1321112011 is 1102111231.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1321112011 - 2³ = 1321112003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321111982 and 1321112000.

It is not an unprimeable number, because it can be changed into a prime (1321112021) 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, 310 + ... + 51403.

It is an arithmetic number, because the mean of its divisors is an integer number (168329070).

Almost surely, 2^1321112011 is an apocalyptic number.

1321112011 is a deficient number, since it is larger than the sum of its proper divisors (25520549).

1321112011 is an equidigital number, since it uses as much as digits as its factorization.

1321112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52205.

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

The square root of 1321112011 is about 36347.1045751928. The cubic root of 1321112011 is about 1097.2692626738.

Adding to 1321112011 its reverse (1102111231), we get a palindrome (2423223242).

The spelling of 1321112011 in words is "one billion, three hundred twenty-one million, one hundred twelve thousand, eleven".