1321280227 has 4 divisors (see below), whose sum is σ = 1353506616. Its totient is φ = 1289053840.

The previous prime is 1321280209. The next prime is 1321280263. The reversal of 1321280227 is 7220821231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321280227 - 2⁷ = 1321280099 is a prime.

It is a super-2 number, since 2×1321280227² = 3491562876522343058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321280195 and 1321280204.

It is not an unprimeable number, because it can be changed into a prime (1321280627) 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, 16113133 + ... + 16113214.

It is an arithmetic number, because the mean of its divisors is an integer number (338376654).

Almost surely, 2^1321280227 is an apocalyptic number.

1321280227 is a deficient number, since it is larger than the sum of its proper divisors (32226389).

1321280227 is an equidigital number, since it uses as much as digits as its factorization.

1321280227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32226388.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1321280227 is about 36349.4185235473. The cubic root of 1321280227 is about 1097.3158321323.

It can be divided in two parts, 13212 and 80227, that added together give a palindrome (93439).

The spelling of 1321280227 in words is "one billion, three hundred twenty-one million, two hundred eighty thousand, two hundred twenty-seven".