1221522348 has 24 divisors (see below), whose sum is σ = 2919737520. Its totient is φ = 397242880.

The previous prime is 1221522347. The next prime is 1221522349. The reversal of 1221522348 is 8432251221.

It is an interprime number because it is at equal distance from previous prime (1221522347) and next prime (1221522349).

It is not an unprimeable number, because it can be changed into a prime (1221522347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1240893 + ... + 1241876.

It is an arithmetic number, because the mean of its divisors is an integer number (121655730).

Almost surely, 2^1221522348 is an apocalyptic number.

It is an amenable number.

1221522348 is an abundant number, since it is smaller than the sum of its proper divisors (1698215172).

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

1221522348 is a wasteful number, since it uses less digits than its factorization.

1221522348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2482817 (or 2482815 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 1221522348 is about 34950.2839473444. The cubic root of 1221522348 is about 1068.9739918877.

Adding to 1221522348 its reverse (8432251221), we get a palindrome (9653773569).

The spelling of 1221522348 in words is "one billion, two hundred twenty-one million, five hundred twenty-two thousand, three hundred forty-eight".