1321112215 has 4 divisors (see below), whose sum is σ = 1585334664. Its totient is φ = 1056889768.

The previous prime is 1321112207. The next prime is 1321112281. The reversal of 1321112215 is 5122111231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5122111231 = 32261 ⋅158771.

It is a cyclic number.

It is not a de Polignac number, because 1321112215 - 2³ = 1321112207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321112192 and 1321112201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132111217 + ... + 132111226.

It is an arithmetic number, because the mean of its divisors is an integer number (396333666).

Almost surely, 2^1321112215 is an apocalyptic number.

1321112215 is a deficient number, since it is larger than the sum of its proper divisors (264222449).

1321112215 is an equidigital number, since it uses as much as digits as its factorization.

1321112215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264222448.

The product of its digits is 120, while the sum is 19.

The square root of 1321112215 is about 36347.1073814685. The cubic root of 1321112215 is about 1097.2693191522.

Adding to 1321112215 its reverse (5122111231), we get a palindrome (6443223446).

The spelling of 1321112215 in words is "one billion, three hundred twenty-one million, one hundred twelve thousand, two hundred fifteen".