1221522324 has 24 divisors (see below), whose sum is σ = 3109329888. Its totient is φ = 370158240.

The previous prime is 1221522319. The next prime is 1221522347. The reversal of 1221522324 is 4232251221.

It is a junction number, because it is equal to n+sod(n) for n = 1221522294 and 1221522303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4626847 + ... + 4627110.

It is an arithmetic number, because the mean of its divisors is an integer number (129555412).

Almost surely, 2^1221522324 is an apocalyptic number.

It is an amenable number.

1221522324 is an abundant number, since it is smaller than the sum of its proper divisors (1887807564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221522324 is a wasteful number, since it uses less digits than its factorization.

1221522324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9253975 (or 9253973 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 1221522324 is about 34950.2836039996. The cubic root of 1221522324 is about 1068.9739848868.

Adding to 1221522324 its reverse (4232251221), we get a palindrome (5453773545).

The spelling of 1221522324 in words is "one billion, two hundred twenty-one million, five hundred twenty-two thousand, three hundred twenty-four".