1221544022 has 8 divisors (see below), whose sum is σ = 1842439872. Its totient is φ = 607397400.

The previous prime is 1221544021. The next prime is 1221544031. The reversal of 1221544022 is 2204451221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221544021) 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, 1686854 + ... + 1687577.

It is an arithmetic number, because the mean of its divisors is an integer number (230304984).

Almost surely, 2^1221544022 is an apocalyptic number.

1221544022 is a deficient number, since it is larger than the sum of its proper divisors (620895850).

1221544022 is a wasteful number, since it uses less digits than its factorization.

1221544022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374614.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1221544022 is about 34950.5940149806. The cubic root of 1221544022 is about 1068.9803142731.

Adding to 1221544022 its reverse (2204451221), we get a palindrome (3425995243).

The spelling of 1221544022 in words is "one billion, two hundred twenty-one million, five hundred forty-four thousand, twenty-two".