1221000242 has 16 divisors (see below), whose sum is σ = 2283429312. Its totient is φ = 475714320.

The previous prime is 1221000229. The next prime is 1221000247. The reversal of 1221000242 is 2420001221.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (1221000247) 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, 3964133 + ... + 3964440.

It is an arithmetic number, because the mean of its divisors is an integer number (142714332).

Almost surely, 2^1221000242 is an apocalyptic number.

1221000242 is a deficient number, since it is larger than the sum of its proper divisors (1062429070).

1221000242 is a wasteful number, since it uses less digits than its factorization.

1221000242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7928593.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1221000242 is about 34942.8138821132. The cubic root of 1221000242 is about 1068.8216690445.

Adding to 1221000242 its reverse (2420001221), we get a palindrome (3641001463).

The spelling of 1221000242 in words is "one billion, two hundred twenty-one million, two hundred forty-two", and thus it is an aban number.