1221988348 has 12 divisors (see below), whose sum is σ = 2443976752. Its totient is φ = 523709280.

The previous prime is 1221988291. The next prime is 1221988357. The reversal of 1221988348 is 8438891221.

1221988348 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1221988298 and 1221988307.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21821193 + ... + 21821248.

Almost surely, 2^1221988348 is an apocalyptic number.

It is an amenable number.

1221988348 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1221988348 is a wasteful number, since it uses less digits than its factorization.

1221988348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43642452 (or 43642450 counting only the distinct ones).

The product of its digits is 221184, while the sum is 46.

The square root of 1221988348 is about 34956.9499241567. The cubic root of 1221988348 is about 1069.1099093213.

The spelling of 1221988348 in words is "one billion, two hundred twenty-one million, nine hundred eighty-eight thousand, three hundred forty-eight".