1222884521 has 8 divisors (see below), whose sum is σ = 1257258120. Its totient is φ = 1188580608.

The previous prime is 1222884473. The next prime is 1222884527. The reversal of 1222884521 is 1254882221.

It can be written as a sum of positive squares in 4 ways, for example, as 868127296 + 354757225 = 29464^2 + 18835^2 .

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 1222884521 - 2⁶ = 1222884457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222884527) 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, 19235 + ... + 53063.

It is an arithmetic number, because the mean of its divisors is an integer number (157157265).

Almost surely, 2^1222884521 is an apocalyptic number.

It is an amenable number.

1222884521 is a deficient number, since it is larger than the sum of its proper divisors (34373599).

1222884521 is an equidigital number, since it uses as much as digits as its factorization.

1222884521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34843.

The product of its digits is 20480, while the sum is 35.

The square root of 1222884521 is about 34969.7658127703. The cubic root of 1222884521 is about 1069.3711974957.

The spelling of 1222884521 in words is "one billion, two hundred twenty-two million, eight hundred eighty-four thousand, five hundred twenty-one".